1.
Which of Newton's Three Laws does the following statement satisfy? The relationship between an object's mass (m), its acceleration (a), and the applied force F is F=ma. Acceleration and force are vectors. This law requires that the direction of the acceleration vector is in the same direction as the force vector.
Correct Answer
B. B: Newton's Second Law
Explanation
Newton's Second Law states that the force acting on an object is directly proportional to the mass of the object and the acceleration produced. The equation F=ma represents this law, where F is the force, m is the mass, and a is the acceleration. This law also states that acceleration and force are vectors, meaning they have both magnitude and direction. The statement in the question satisfies Newton's Second Law because it describes the relationship between force, mass, and acceleration and emphasizes the direction of the acceleration vector being the same as the force vector.
2.
Which of Newton's Three Laws does the following statement satisfy? For every action there is an equal and opposite reaction.
Correct Answer
C. C: Newton's Third Law
Explanation
The statement "For every action there is an equal and opposite reaction" is a direct representation of Newton's Third Law of Motion. This law states that for every force exerted on an object, there is an equal and opposite force exerted by the object. This law explains the relationship between two interacting objects and how their forces are always equal in magnitude and opposite in direction. Therefore, the correct answer is C: Newton's Third Law.
3.
Which of Newton's Three Laws does the following statement satisfy? Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.
Correct Answer
A. A: Newton's First Law
Explanation
This statement satisfies Newton's First Law, also known as the law of inertia. According to this law, an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction, unless acted upon by an external force. This statement describes the tendency of objects in uniform motion to remain in that state unless a force is applied to change their motion.
4.
Which of Newton's three laws does the following example illustrate? If you have a hockey puck sliding along a table, it will eventually come to a stop.
Correct Answer
A. A: Newton's First Law
Explanation
The given example illustrates Newton's First Law of motion. This law states that an object at rest will remain at rest, and an object in motion will continue to move at a constant velocity, unless acted upon by an external force. In the case of the hockey puck sliding along a table, it will eventually come to a stop due to the presence of friction, which acts as an external force opposing its motion.
5.
Which of Newton's Laws does this situation represent? Imagine a ball moving in a straight line directly toward when another ball collides with it. The moving ball exerts a force on the ball at rest. This causes the ball at rest to accelerate. However, the ball at rest also exerts the same magnitude of force (in the opposite direction) of the moving ball. This will cause the moving ball to decelerate or even move in another direction.
Correct Answer
C. C: Newton's Third Law
Explanation
This situation represents Newton's Third Law. According to Newton's Third Law, for every action, there is an equal and opposite reaction. In this case, the moving ball exerts a force on the ball at rest, causing it to accelerate. However, the ball at rest also exerts the same magnitude of force in the opposite direction, causing the moving ball to decelerate or even change direction. This demonstrates the principle of action and reaction forces being equal and opposite.
6.
In the following example, what are the forces that are acting on the ball? Check all that apply. If a ball is thrown in the air, it will keep going the same velocity unless a force changes the velocity (speed and direction). Mark all that apply.
Correct Answer(s)
A. A: air friction
B. B: gravity
C. C: resistance of the ground
Explanation
The correct answer is A: air friction, B: gravity, and C: resistance of the ground. When a ball is thrown in the air, it experiences the force of gravity pulling it downwards. It also experiences air friction, which opposes its motion through the air. Additionally, when the ball comes in contact with the ground, it experiences the resistance of the ground, which can affect its motion. The mass of the ball, option D, does not directly affect the forces acting on it.
7.
Which law states the need to wear seat belts?
Correct Answer
A. A: Newton's First Law
Explanation
Newton's First Law, also known as the law of inertia, states that an object at rest will stay at rest and an object in motion will stay in motion with the same speed and direction unless acted upon by an external force. This law does not directly address the need to wear seat belts. The correct answer should be "none of the above" because the law that states the need to wear seat belts is not mentioned in the options provided.
8.
____________ ______________ ________________ was the scientist who gave us the Laws of Motion.
Correct Answer
Sir.
Isaac
Newton
Explanation
Sir. Isaac Newton was the scientist who gave us the Laws of Motion.
9.
What is another name for the Newton's first law of motion?
Correct Answer
C. C: Law of Inertia
Explanation
The correct answer is C: Law of Inertia. Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will continue moving at a constant velocity, unless acted upon by an external force. Inertia refers to an object's resistance to changes in its motion, and this law describes the concept of inertia.
10.
Which of Newton's Three Law does the following example illustrate? The blood in your head rushes to your feet when riding on an elevator this is descending and abruptly stops.
Correct Answer
A. A: Newton's First Law
Explanation
The given example illustrates Newton's First Law, also known as the law of inertia. According to this law, an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force. In the case of the elevator abruptly stopping, the blood in your head, which was in motion, tends to continue moving forward due to its inertia, causing it to rush towards your feet.