Kinetic and Potential Energy

Pablo is sledding down a very steep hill. At which point is Pablo's kinetic energy the greatest? (2)

• At the top of the hill

• At the very bottom of the hill?

• At the middle of the hill

• Just before the bottom of the hill

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NGSS.MS-PS3-1

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The mass of one boulder is 1,000 kilograms, and the mass of the other boulder is 50 kilograms. If both of the boulders are moving at the same speed, which of the following statements is true when both reach point A before touching the ground? (1)

• Neither boulder has any kinetic energy.

• The 1,000-kg boulder has more kinetic energy than the 50-kg boulder.

• The boulders have the same kinetic energy.

• The 50-kg boulder has more kinetic energy than the 1,000-kg boulder.

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Which of the following statements best explains the relationship between the kinetic energy of the ball and its speed? (3)

• The kinetic energy of the ball increases as its speed increases.

• The kinetic energy of the ball decreases as its speed increases.

• The kinetic energy of the ball increases over time as the ball travels at a constant

  speed.

• The kinetic energy of the ball remains the same as its speed increases.

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NGSS.MS-PS3-1

Sam is about to drop a golf ball from his hand. As the ball falls, its __________ energy will decrease and its __________ energy will increase. (4)

• kinetic, potential

• potential, kinetic

• heat, kinetic

• potential, heat

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Which of the following is an example of kinetic energy being converted to potential energy? (2)

• A bike rider stops pedaling and lets his bicycle coast up a hill.

• The cord of a bow-and-arrow is released, propelling the arrow forward.

• On a factory assembly line, boxes slide down a ramp.

• At an ice rink, an ice skater gives another ice skater a gentle push.

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NGSS.MS-PS3-5

Four children are playing on a slide at a park. They take turns going down the slide. The table below shows how much each child weighs. Based on the information in the table, which child has the greatest potential energy at the top of the slide? (4)

• child 1

• child 2

• child 3

• child 4

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Kinetic energy is the energy of motion. How could a person determine how much kinetic energy an object has? (3)

• by finding its speed and direction

• by finding its mass and speed

• by finding its height and width

• by finding its position and form

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Two identical trains, Train A and Train B, are traveling along parallel rails. The speed of Train A is 88 km/hr, and the speed of Train B is 96 km/hr. Based on this information, which of the following statements is true? (3)

• The trains have the same kinetic energy.

• Neither train has any kinetic energy.

• Train A has more kinetic energy than Train B.

• Train B has more kinetic energy than Train A.

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NGSS.MS-PS3-1

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Clyde and Marilyn are riding a roller coaster. During which section(s) of the track is their kinetic energy converted to potential energy? (5)

• from point A to point B only

• from point B to point D only

• from point B to point C only

• from point A to point B and from point C to point D

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NGSS.MS-PS3-2

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Clyde and Marilyn are riding a roller coaster. During which section(s) of the track is their potential energy converted to kinetic energy? (5)

• from point A to point B only

• from point B to point D only

• from point B to point C only

• from point A to point B and from point C to point D

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