Sir Eman's Online Physics Quiz No. 04

A vector quantity is a quantity that has both magnitude and direction. It is used to describe physical quantities such as displacement, velocity, and force. Vectors are represented by arrows, where the length of the arrow represents the magnitude and the direction of the arrow represents the direction. In contrast, scalar quantities only have magnitude and no direction. Therefore, the correct answer is vector quantity or simply vector.

Speed is a scalar quantity that represents the rate at which an object moves. It only considers the magnitude of the object's motion, regardless of its direction. On the other hand, velocity is a vector quantity that includes both the magnitude and direction of an object's motion. Therefore, velocity accounts for both how fast an object is moving and in what direction it is moving.

QUANTUM PHYSICS DAW sagot ng isa sa SUMMATIVE? AHAHAHAHA... tama nga nman siya :P

The SI unit of force is called a Newton. It is named after Sir Isaac Newton, who made significant contributions to the field of physics. The Newton is defined as the force required to accelerate a one-kilogram mass by one meter per second squared. It is widely used in scientific calculations and is a fundamental unit in mechanics.

An elastic collision refers to a collision between objects where there is no lasting deformation or generation of heat. In an elastic collision, the kinetic energy of the system is conserved, meaning that the total energy before the collision is equal to the total energy after the collision. This implies that the objects bounce off each other without any loss of energy. Therefore, the given answer of "elastic collision" accurately describes a collision where colliding objects collide without lasting deformation or generation of heat.

A scalar is a quantity that can be described solely by its magnitude, without any direction. Scalar quantities do not have any associated vectors or directions. They only have a numerical value or magnitude, such as temperature, mass, or time. Therefore, the terms "scalar" and "scalar quantity" both refer to a quantity that lacks direction and can be described by its magnitude alone.

One centimeter is equal to 10 millimeters. Therefore, there are 10 millimeters in one centimeter. The answer options provided all state the correct conversion of 10 millimeters for one centimeter, with variations in formatting.

Inertia is the tendency of an object to resist changes in its state of motion. This means that an object at rest will stay at rest, and an object in motion will continue moving at a constant speed and direction, unless acted upon by an external force. Inertia is a property of matter and is related to the mass of an object. The greater the mass, the greater the inertia, and the harder it is to change the object's motion. Inertia is a fundamental concept in physics and helps explain why objects behave the way they do.

The shape of a projectile's trajectory is a parabola. A parabola is a U-shaped curve that is symmetric and opens either upwards or downwards. In the case of a projectile, such as a ball thrown into the air, its path follows a parabolic trajectory due to the force of gravity. The projectile starts with an upward motion, reaches its highest point, and then falls back down in a curved path. Therefore, parabola is the correct answer to describe the shape of a projectile's trajectory.

Acceleration is the rate at which an object's velocity changes over time. In a velocity versus time graph, the slope represents the change in velocity divided by the change in time, which is the definition of acceleration. Therefore, the correct answer is acceleration.

The correct answer is "the gravitational attraction between you and the earth." This is because weight is the force exerted on an object due to gravity. It is directly proportional to the mass of the object and the acceleration due to gravity. In this case, the weight refers to the gravitational force between the person and the Earth, which is the reason why we feel weight on the surface of the Earth.

The given answer, "measurement," accurately describes the act of comparing a quantity to a standard. In measurement, a specific unit or standard is used as a reference point to determine the magnitude or extent of the quantity being measured. This process allows for the establishment of a numerical value or a quantitative representation of the quantity in question. By comparing the quantity to a standard, measurement provides a means of understanding and expressing the characteristics or dimensions of an object or phenomenon.

The slope of a distance versus time graph represents the rate at which an object is changing its position over time. This can be interpreted as the speed of the object, which is the magnitude of its velocity. Velocity, on the other hand, includes both the speed and the direction of the object's motion. Therefore, both speed and velocity can be determined by analyzing the slope of a distance versus time graph.

Momentum is defined as the quantity of motion an object has. It is a property of moving objects and is directly proportional to the mass and velocity of the object. Inertia, on the other hand, is the tendency of an object to resist changes in its motion. In this context, "inertia in motion" refers to the concept of momentum, as it implies that an object with momentum will continue to move in the same direction unless acted upon by an external force. Therefore, the correct answer for this question is momentum.

An inelastic collision refers to a collision between two objects where there is lasting deformation and the generation of heat. In this type of collision, the kinetic energy of the system is not conserved, as some of it is transformed into other forms of energy, such as heat or potential energy. This can occur when the colliding objects stick together or when they deform upon impact.

Acceleration is a measure of how fast an object's velocity changes over time. It indicates the rate at which an object speeds up, slows down, or changes direction. It is not a measure of how fast an object moves in general, but rather how quickly its velocity is changing. Therefore, acceleration is the correct answer for this question.

Impulse is a quantity that represents the change in momentum. It is calculated by multiplying the force applied to an object by the time over which the force is applied. Impulse is a vector quantity and has the same direction as the change in momentum. It is often used in physics to analyze the effects of forces on objects and to understand the motion of objects in collisions or interactions.

When the acceleration of a falling object is 9.8 m/s^2, it is in free fall or freefall. This means that the object is only influenced by the force of gravity and is not experiencing any other external forces, such as air resistance. In free fall, the object is accelerating downwards at a rate of 9.8 m/s^2, regardless of its mass. This concept is often used to describe the motion of objects falling near the surface of the Earth.

Trajectory refers to the path followed by a projectile, such as a bullet or a ball, as it moves through the air or space. It describes the curve or arc that the object takes from its initial position to its final destination. The term trajectory is commonly used in physics and ballistics to analyze and predict the motion of projectiles.

A projectile refers to any object that is in motion through the air or space and is affected by the force of gravity. It can be launched or thrown and follows a curved path called a trajectory. The key characteristic of a projectile is that it is subject to both horizontal and vertical motion simultaneously. This includes objects like a baseball being thrown, a bullet fired from a gun, or a rocket launched into space.

A unit vector is a vector with a magnitude of one. It is used solely to indicate direction and does not have any other purpose. Unit vectors are commonly used in mathematics and physics to simplify calculations and describe the direction of other vectors. They are often represented by a lowercase letter with a hat on top (e.g., ȳ) to distinguish them from regular vectors.

The correct answer is that the milk carton has inertia. Inertia is the tendency of an object to resist changes in its state of motion. In this case, when the paper is jerked quickly, the milk carton tends to stay in place due to its inertia. This is because the milk carton wants to remain at rest, and the force applied by the paper is not enough to overcome its inertia and cause it to topple. This demonstrates the concept of inertia, which is the property of matter that resists changes in motion.

The object on the moon has a greater mass. Weight is a measure of the force exerted on an object due to gravity, and it is dependent on the mass of the object and the strength of the gravitational field. Since both objects have the same weight, but the gravitational field on the moon is weaker than on Earth, the object on the moon must have a greater mass to counterbalance the weaker gravitational force.

A derived quantity is a quantity that is formed by combining two or more fundamental quantities. It is derived from the fundamental quantities through mathematical operations or equations. In this context, the correct answer is "derived quantity" because it accurately describes a quantity that is a combination of 2 or more fundamental quantities.

The law stating that the acceleration of an object is directly proportional to the force and inversely proportional to mass is known as Newton's second law of motion. According to this law, the acceleration of an object is equal to the force applied to it divided by its mass. This means that the greater the force applied to an object, the greater its acceleration will be, and the greater the mass of the object, the smaller its acceleration will be for a given force.

The term "resultant" refers to the sum of two or more vectors. When multiple vectors are added together, their combined effect is represented by the resultant vector. In other words, it is the vector that represents the overall effect or outcome of the individual vectors when combined. Therefore, the correct answer is "resultant" or "resultant vector".

Significant figures, significant digits, and significant numbers are all terms used to describe the numbers that contribute to the precision of a measurement. They represent the digits in a number that are known with certainty plus one uncertain or estimated digit. These digits are important because they indicate the level of precision or accuracy in a measurement. The more significant figures a number has, the more precise the measurement is considered to be.

The x-component refers to the part of a vector that lies on the x-axis. It represents the magnitude of the vector in the x-direction. The x-component is a scalar quantity that can be positive or negative, depending on the direction of the vector. It is often used in vector operations and calculations, such as finding the resultant vector or decomposing a vector into its components. The term "x component" is a common way to refer to this specific part of a vector in mathematics and physics.

The correct answer is "interaction" because it refers to the concept that for every action, there is an equal and opposite reaction. This law, known as the Law of Interaction, states that when two objects interact with each other, they exert equal and opposite forces on each other. This principle is fundamental in understanding the dynamics of objects and is a key concept in physics.

When the net force acting on a system is equal to zero, it means that all the forces acting on the system are balanced and cancel each other out. In this state, the system is said to be in mechanical equilibrium. This means that there is no acceleration or change in motion occurring in the system. The forces are in equilibrium, resulting in a stable and balanced state.