GPE transform to KE

What is the formula for calculating gravitational potential energy (GPE)?

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NGSS.MS-PS3-2

If a skater has a mass of 75 kg and is at a height of 6 meters, what is their gravitational potential energy (GPE) assuming gravity is 10 m/s²?

• 4500 J

• 7500 J

• 450 J

• 750 J

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NGSS.MS-PS3-2

At which point does the skater have no gravitational potential energy (GPE)?

• Point A

• Point B

• Point C

• Point D

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NGSS.MS-PS3-2

Where has the energy gone when the skater has no gravitational potential energy (GPE) at point C?

• It has been converted into kinetic energy.

• It has been lost as heat.

• It has been stored as chemical energy.

• It has disappeared.

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In the real world, a skater will not continue rolling up and down a skate ramp forever. Why is this the case?

• Because of air resistance and friction

• Because of the skater's weight

• Because of the ramp's height

• Because of the skater's speed

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Gravity on Earth is given a value of 10 N/kg, but on the moon gravity has a value of 1.6 N/kg. How high above the moon’s surface would the skater have to be to have the same amount of GPE as the skater on Earth 6m above the ground?

• 37.5 m

• 60 m

• 16 m

• 3.75 m

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NGSS.MS-PS3-2

What happens to the kinetic energy of the skater when they reach the highest point on the ramp?

• It is converted into gravitational potential energy.

• It is lost as sound energy.

• It remains constant.

• It is converted into thermal energy.

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Why does a skater eventually come to a stop on a flat surface?

• Because of gravitational pull.

• Because of air resistance and friction.

• Because of the skater's mass.

• Because of the skater's initial speed.

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What type of energy transformation occurs when a skater moves down a ramp?

• Gravitational potential energy to kinetic energy.

• Chemical energy to thermal energy.

• Thermal energy to gravitational potential energy.

• Kinetic energy to chemical energy.

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What happens to the skater's kinetic energy as they ascend a ramp?

• It is converted into gravitational potential energy.

• It is converted into sound energy.

• It remains constant.

• It is converted into light energy.

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NGSS.MS-PS3-2

NGSS.MS-PS3-5