Motions And Forces-test A

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  • 1/30 Questions

    The direction and speed of a moving object

    • Velocity
    • Balanced forces
    • Force
    • Gravitational force
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Motions And Forces-test A - Quiz
About This Quiz

Motions and Forces-Test A covers key concepts in dynamics such as velocity, force, acceleration, inertia, and balanced and unbalanced forces. This quiz assesses understanding of how these principles govern motion and interactions, crucial for learners in physics.

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  • 2. 

    A push or pull

    • Acceleration

    • Balanced forces

    • Force

    • Gravitational force

    Correct Answer
    A. Force
    Explanation
    Force is the correct answer because it refers to a push or pull that can cause an object to accelerate or change its motion. Force is a fundamental concept in physics and is measured in units of Newtons. It can be exerted by any object on another object and is responsible for causing changes in velocity or deformation in objects. Forces can be balanced or unbalanced, and they can be caused by a variety of interactions such as gravitational force, electromagnetic force, or contact force.

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  • 3. 

    An object's change in velocity divided by the time it takes for that change to occur

    • Acceleration

    • Balanced forces

    • Force

    • Gravitational force

    Correct Answer
    A. Acceleration
    Explanation
    Acceleration is defined as the change in velocity of an object divided by the time it takes for that change to occur. It represents how quickly an object's velocity is changing. If the velocity of an object is increasing, the acceleration will be positive, while if the velocity is decreasing, the acceleration will be negative. Acceleration is a fundamental concept in physics and is used to describe the motion of objects in various scenarios.

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  • 4. 

    The tendency of matter to resist a change in its state of motion

    • Acceleration

    • Balanced forces

    • Force

    • Inertia

    Correct Answer
    A. Inertia
    Explanation
    Inertia is the tendency of matter to resist a change in its state of motion. It is the property of an object to stay at rest or continue moving at a constant velocity unless acted upon by an external force. Inertia is directly related to an object's mass, with greater mass resulting in greater inertia. This concept is fundamental in understanding the behavior of objects in motion and is a key principle in Newton's laws of motion.

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  • 5. 

    Forces that do not cancel out one another

    • Unbalanced forces

    • Balanced forces

    • Force

    • Gravitational force

    Correct Answer
    A. Unbalanced forces
    Explanation
    Unbalanced forces refer to forces that are not equal in magnitude and opposite in direction, resulting in a net force. These forces cause an object to accelerate or change its motion. When the forces acting on an object are balanced, they cancel each other out, resulting in no net force. However, in the case of unbalanced forces, there is a residual force that causes a change in the object's motion.

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  • 6. 

    Forces that cancel out one another

    • Acceleration

    • Balanced forces

    • Force

    • Gravitational force

    Correct Answer
    A. Balanced forces
    Explanation
    Balanced forces refer to forces that are equal in magnitude and opposite in direction, resulting in a net force of zero. When forces cancel each other out, there is no acceleration, meaning that the object remains at rest or continues to move at a constant velocity. This concept is based on Newton's first law of motion, which states that an object will remain in its state of motion unless acted upon by an unbalanced force. Therefore, balanced forces can explain why an object does not accelerate when the forces acting on it are equal and opposite.

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  • 7. 

    A force that acts between any two masses in the universe and pulls them toward each other

    • Acceleration

    • Balanced force

    • Force

    • Gravitational force

    Correct Answer
    A. Gravitational force
    Explanation
    Gravitational force is a force that exists between any two masses in the universe and pulls them towards each other. It is responsible for the attraction between objects with mass, such as planets, stars, and everyday objects on Earth. This force is always present and acts over any distance, becoming stronger as the masses of the objects increase or as they get closer to each other. The gravitational force is what keeps objects on the surface of the Earth and governs the motion of celestial bodies in the universe.

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  • 8. 

    A measure of the force of gravity on an object

    • Weight

    • Balanced forces

    • Force

    • Gravitational force

    Correct Answer
    A. Weight
    Explanation
    Weight is a measure of the force of gravity on an object. It is the result of the gravitational force exerted by a celestial body, such as Earth, on the object. The weight of an object can change depending on the strength of the gravitational field it is in. For example, an object would weigh less on the moon compared to Earth because the moon has a weaker gravitational pull. Weight is commonly measured in units of force, such as pounds or newtons.

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  • 9. 

    A student walked three miles in one hour.  With this information, what can you compute?

    • Her direction

    • Her force

    • Her speed

    • Her velocity

    Correct Answer
    A. Her speed
    Explanation
    Based on the information given, the student walked three miles in one hour. Speed is defined as the distance traveled per unit of time, so we can compute her speed using the formula speed = distance/time. Therefore, we can compute her speed based on the given information.

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  • 10. 
    What prevents the man from moving the box? - ProProfs

    What prevents the man from moving the box?

    • Acceleration

    • Air pressure

    • Inertia

    • Velocity

    Correct Answer
    A. Inertia
    Explanation
    Inertia is the correct answer because it is the property of matter that resists any change in its state of motion. In this case, the man is unable to move the box because the box has inertia and requires a force to overcome it. The box will remain at rest or continue moving at a constant velocity until an external force is applied to it.

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  • 11. 

    Two girls are helping each other push a cart of books down the hallway.  What is the total of their force called?

    • Frictional force

    • Gravitational force

    • Net force

    • Universal force

    Correct Answer
    A. Net force
    Explanation
    The total force exerted by the two girls on the cart of books is called the net force. This force takes into account the combined effort of both girls and is responsible for the overall motion of the cart. It is the vector sum of all the individual forces acting on the cart, including any external forces such as friction or gravity. The net force determines whether the cart will accelerate, decelerate, or remain at a constant velocity.

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  • 12. 

    Two teams are having a tug of war.  Neither team is winning.  What kind of force is acting on the rope?

    • Balanced force

    • Magnetic force

    • Unbalanced force

    • Vertical force

    Correct Answer
    A. Balanced force
    Explanation
    In a tug of war, when neither team is winning, it means that the forces applied by both teams are equal in magnitude and opposite in direction. This results in a balanced force acting on the rope.

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  • 13. 

    Which force pulls statically charged objects?

    • Electrical force

    • Gravitational force

    • Magnetic force

    • Nuclear force

    Correct Answer
    A. Electrical force
    Explanation
    The electrical force is the correct answer because it is the force that acts between static charged objects. When objects have an imbalance of positive and negative charges, they exert an electrical force on each other, either attracting or repelling depending on the charges. This force is responsible for various phenomena, such as the attraction between protons and electrons in an atom or the repulsion between two positively charged objects.

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  • 14. 

    Forces that cancel one another are

    • Balanced forces

    • Friction

    • Gravitational forces

    • Weight

    Correct Answer
    A. Balanced forces
    Explanation
    Balanced forces refer to forces that are equal in magnitude and opposite in direction, resulting in a net force of zero. When two or more forces cancel each other out, they are considered balanced forces. This means that there is no overall change in the object's motion, as the forces are in equilibrium.

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  • 15. 

    When you are measuring the force of gravity on your body, you are measuring your

    • Weight

    • Velocity

    • Force

    • Acceleration

    Correct Answer
    A. Weight
    Explanation
    When you are measuring the force of gravity on your body, you are measuring your weight. Weight is the force exerted on an object due to gravity, and it is directly proportional to the mass of the object. It is commonly measured in units of Newtons (N) and is influenced by the mass of the object and the acceleration due to gravity. Therefore, when you measure the force of gravity on your body, you are essentially measuring your weight.

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  • 16. 

    The force that pulls masses together is the 

    • Gravitational force

    • Weight

    • Velocity

    • Force

    Correct Answer
    A. Gravitational force
    Explanation
    The force that pulls masses together is the gravitational force. This force is responsible for the attraction between objects with mass. It is the reason why objects fall towards the Earth and why planets orbit around the Sun. The gravitational force depends on the masses of the objects and the distance between them. It is a fundamental force in nature that plays a crucial role in shaping the structure and behavior of the universe.

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  • 17. 

    The force that prevents or slows motion between objects that are touching is 

    • Friction

    • Gravitational force

    • Weight

    • Velocity

    Correct Answer
    A. Friction
    Explanation
    Friction is the force that opposes or hinders the motion between objects that are in contact with each other. It is caused by the roughness of surfaces and the interlocking of microscopic irregularities. Friction can either prevent or slow down the motion between objects, depending on the direction and magnitude of the force applied. Gravitational force is the force of attraction between two objects due to their mass, weight is the force exerted on an object due to gravity, and velocity is the measure of the speed and direction of an object's motion.

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  • 18. 

    Masses resist changes to their motion because they have

    • Inertia

    • Balanced forces

    • Friction

    • Gravitational force

    Correct Answer
    A. Inertia
    Explanation
    Masses resist changes to their motion because of inertia. Inertia is the tendency of an object to resist any change in its motion. This means that an object at rest will remain at rest, and an object in motion will continue moving in a straight line at a constant speed, unless acted upon by an external force. Inertia is directly related to the mass of an object, with larger masses having greater inertia. Therefore, the correct answer is inertia.

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  • 19. 

    The speed and direction of an object's motion are its

    • Velocity

    • Force

    • Acceleration

    • Inertia

    Correct Answer
    A. Velocity
    Explanation
    Velocity refers to the speed of an object in a specific direction. It is a vector quantity that takes into account both the magnitude (speed) and the direction of motion. Therefore, velocity is the correct answer as it accurately describes the speed and direction of an object's motion.

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  • 20. 

    A push or a pull is a 

    • Force

    • Acceleration

    • Inertia

    • Balanced forces

    Correct Answer
    A. Force
    Explanation
    The correct answer is force. Force is defined as a push or a pull that can cause an object to move, stop, or change its speed or direction. It is a fundamental concept in physics and is measured in units called Newtons. Forces can be applied in various ways and can have different effects on objects, such as causing them to accelerate, decelerate, or remain at rest.

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  • 21. 

    An object's change in velocity divided by the time over which the change occurred is

    • Acceleration

    • Inertia

    • Balanced forces

    • Friction

    Correct Answer
    A. Acceleration
    Explanation
    Acceleration is defined as the rate at which an object's velocity changes over time. It is calculated by dividing the change in velocity by the time taken for the change to occur. Therefore, the given statement accurately describes the concept of acceleration. In contrast, inertia refers to an object's resistance to change in motion, balanced forces refer to forces that cancel each other out resulting in no change in motion, and friction is the force that opposes motion.

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  • 22. 

    Which two factors affect gravitational force?

    • Acceleration and masses

    • Distance and masses

    • Distance and sizes

    • Volume and masses

    Correct Answer
    A. Distance and masses
    Explanation
    Gravitational force is determined by the masses of the objects involved and the distance between them. The greater the mass of an object, the stronger its gravitational force. Similarly, the closer two objects are to each other, the stronger their gravitational force. Therefore, both distance and masses are factors that affect gravitational force. The other options, acceleration, sizes, and volume, are not directly related to gravitational force.

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  • 23. 

    Which surface would probably offer the least friction if you were to slide a box across it?

    • Brick

    • Carpet

    • Ice

    • Wood

    Correct Answer
    A. Ice
    Explanation
    Ice would probably offer the least friction if you were to slide a box across it. This is because ice has a smooth and slippery surface, which reduces the amount of friction between the box and the ice. In contrast, brick, carpet, and wood surfaces are rougher and have more texture, resulting in higher levels of friction when objects slide across them.

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  • 24. 

    An object is floating in a container of water.  Which force opposes gravity?

    • Buoyant force

    • Electricity

    • Friction

    • Surface tension

    Correct Answer
    A. Buoyant force
    Explanation
    The buoyant force is the force that opposes gravity when an object is floating in a container of water. This force is exerted by the water on the object and is equal to the weight of the water displaced by the object. It acts in the upward direction, counteracting the downward force of gravity, allowing the object to float. The other options, electricity, friction, and surface tension, are not forces that specifically oppose gravity in this scenario.

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  • 25. 

    Two tug-of-war teams pull with great force on a rope, but there is no motion of the rope.  Why not?

    • Balanced forces act on the rope.

    • Gravity cancels friction on the rope.

    • The net force on the rope is not zero.

    • Unbalanced forces act on the rope.

    Correct Answer
    A. Balanced forces act on the rope.
    Explanation
    The correct answer is that balanced forces act on the rope. When two teams pull with equal force in opposite directions, the forces cancel each other out, resulting in a net force of zero. This means that there is no overall force acting on the rope, causing it to remain motionless.

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  • 26. 

    An object is accelerating at a rate of 10 mi/hr per second.  After 1 sec, its speed is 10 mi/hr.  After 2 sec, its speed is 20 mi/hr.  What is its speed after 3 sec?

    • 10 mi/hr

    • 20 mi/hr

    • 30 mi/hr

    • 100 mi/hr

    Correct Answer
    A. 30 mi/hr
    Explanation
    The object is accelerating at a constant rate of 10 mi/hr per second. This means that its speed increases by 10 mi/hr every second. After 1 second, its speed is 10 mi/hr. After 2 seconds, its speed increases by another 10 mi/hr, resulting in a speed of 20 mi/hr. Therefore, after 3 seconds, its speed will increase by another 10 mi/hr, resulting in a speed of 30 mi/hr.

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  • 27. 
    Think about the forces acting on the parachutist.  The force of air resistance pushes up.  Which is the force pulling down? - ProProfs

    Think about the forces acting on the parachutist.  The force of air resistance pushes up.  Which is the force pulling down?

    • Friction

    • Gravity

    • Magnetism

    • Surface tension

    Correct Answer
    A. Gravity
    Explanation
    The force pulling down on the parachutist is gravity. Gravity is the force that attracts objects towards the center of the Earth. In this case, gravity is pulling the parachutist downwards, counteracting the force of air resistance pushing upwards.

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  • 28. 

    Which two factors keep a planet in orbit around the sun?

    • Gravity and the planet's inertia

    • Gravity and the planet's weight

    • Gravity and the planet's size

    • Gravity and the sun's inertia

    Correct Answer
    A. Gravity and the planet's inertia
    Explanation
    Gravity is the force that attracts objects towards each other, and it is responsible for keeping a planet in orbit around the sun. The planet's inertia, which is its tendency to resist changes in motion, also contributes to keeping it in orbit. As the planet moves in its orbit, its inertia causes it to continue moving forward, while gravity pulls it towards the sun, creating a balance that maintains the planet's orbit. The planet's weight and size are not directly related to keeping it in orbit, making them incorrect choices.

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  • 29. 
    Look at the graph below.  It shows how a car's distance changed.  At what time was the car's acceleration greatest? - ProProfs

    Look at the graph below.  It shows how a car's distance changed.  At what time was the car's acceleration greatest?

    • During the first 5 sec

    • During the second 5 sec

    • During the third 5 sec

    • During the fourth 5 sec

    Correct Answer
    A. During the fourth 5 sec
    Explanation
    The graph shows the distance changing over time. The steeper the slope of the graph, the greater the acceleration. During the fourth 5 seconds, the graph has the steepest slope, indicating the greatest acceleration.

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  • 30. 

    Can two buses travel at the same speed but with different velocities?

    • Yes

    • No

    Correct Answer
    A. Yes
    Explanation
    Yes, two buses can travel at the same speed but with different velocities. Speed is a scalar quantity that only considers the magnitude of the motion, while velocity is a vector quantity that takes into account both the magnitude and direction of the motion. So, even if two buses are moving at the same speed, they can have different velocities if they are moving in different directions.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 18, 2011
    Quiz Created by
    Jhuneycutt

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