Energy and Motion Practice

Which of the following is an example of a push and a pull you might experience in everyday life?

• Pushing a door open and pulling a drawer out

• Pushing a button and pulling a lever

• Pushing a cart and pulling a suitcase

• Pushing a swing and pulling a rope

Answer explanation

The correct choice, 'Pushing a door open and pulling a drawer out', clearly illustrates both a push (opening the door) and a pull (drawing out the drawer), making it a perfect example of these actions in everyday life.

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To describe a car’s motion, you should use its direction and _______.

• Speed

• Color

• Size

• Weight

Answer explanation

To describe a car's motion, you need to specify its direction and speed. Speed indicates how fast the car is moving, making it essential for understanding its motion, unlike color, size, or weight.

Tags

NGSS.MS-PS3-1

_________________________ energy is the energy of motion.

• Kinetic

• Potential

• Thermal

• Chemical

Answer explanation

Kinetic energy is defined as the energy of motion. It is the energy possessed by an object due to its movement, making 'Kinetic' the correct choice in this context.

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Friction is a force that opposes _______________________. It is created when two objects rub against each other.

• Motion

• Gravity

• Magnetism

• Electricity

Answer explanation

Friction is a force that opposes motion, acting when two surfaces rub against each other. It resists the movement of objects, making 'motion' the correct choice.

To describe a car’s motion, you should use its direction and _______________________.

• Speed

• Color

• Size

• Weight

Answer explanation

To describe a car's motion, you need to specify its direction and speed. Speed indicates how fast the car is moving, making it essential for understanding its motion, unlike color, size, or weight.

Tags

NGSS.MS-PS3-1

Two boxes have the same mass. Hector pushed Box 1 by himself. Hector and 3 of his friends all pushed Box 2 together. Which box likely had a greater change in motion?

• Box 1

• Box 2

• Both boxes had the same change in motion

• It cannot be determined

Answer explanation

Box 2 likely had a greater change in motion because it was pushed by Hector and 3 friends, resulting in a greater total force applied compared to Box 1, which was pushed by Hector alone.

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NGSS.MS-PS2-2

__________ energy is the energy of motion.

• Kinetic

• Potential

• Thermal

• Chemical

Answer explanation

Kinetic energy is defined as the energy of motion, which is why it is the correct answer. Potential energy, thermal energy, and chemical energy refer to stored energy or energy related to temperature and chemical bonds, respectively.

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Which example shows a baseball with kinetic energy.

Answer explanation

A baseball in motion, such as one being thrown or hit, possesses kinetic energy due to its velocity. In contrast, a stationary baseball does not have kinetic energy.

Tags

NGSS.MS-PS3-1

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Two boxes have the same mass. Hector pushed Box 1 by himself. Hector and 3 of his friends all pushed Box 2 together. Which box likely had a greater change in motion? Why?

• Box 1, because Hector pushed it alone.

• Box 2, because more people pushed it.

• Both boxes had the same change in motion.

• Neither box had any change in motion.

Answer explanation

Box 2 likely had a greater change in motion because it was pushed by Hector and 3 friends, resulting in a greater total force applied compared to Box 1, which was pushed by Hector alone.

Tags

NGSS.MS-PS2-2

Ji-hoon pushed a toy car and a real car with the same amount of force. Which car moved farther?

• The toy car

• The real car

• Both moved the same distance

• Neither moved

Answer explanation

The toy car, being lighter and having less inertia, will move farther when pushed with the same force compared to the real car, which is heavier and requires more force to achieve the same distance.

Tags

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