Conservation of Mechanical Energy

At which point is potential energy greatest?

• W
• X
• Y
• Z

2. The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?

• 1
• 2
• 3
• 4

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

Based on the diagram of a roller coaster car on a roller coaster track, what statement is true?

• The car at point A has more kinetic energy than the car at point C

• The car at point C has less kinetic energy than the car at point B.

• The car at point C has more kinetic energy than the car at point B.

• The car at point D has less potential energy than the car at point B.

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NGSS.HS-PS3-1

NGSS.HS-PS3-2

Which of the following has the largest kinetic energy?

• 
• 
• 
• 

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NGSS.HS-PS3-1

NGSS.HS-PS3-2

What is the Kinetic Energy at point B?

• 500,000 J

• 400,000 J

• 300,000 J

• 50,000 J

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NGSS.HS-PS3-1

What is the GPE at point E?

• 500,000 J

• 250,000 J

• 300,000 J

• 100,000 J

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NGSS.HS-PS3-1

A 40 kg crate is picked up by a crane to a height of 50m. The crate falls. What is the velocity of the crate just before it hits the ground?

• 2000 Joules
• 19,600 Joules
• 19,600 m/s
• 31.3 m/s

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NGSS.HS-PS2-4

1. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?

• 0.26 m

• 0.52 m

• 5.2 m

• 25 m

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NGSS.HS-PS3-1

A 1.0 kg ball is stationary at the top of a hill that is 10.0 meters in height. The ball rolls all the way down the hill. What is its gravitational potential energy at the bottom of the hill?

• 0 joules

• 98 joules

• 49 joules

• 38 joules

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NGSS.MS-PS3-2

A roller coaster uses a motor to take a car to the top of its first hill. The roller coaster then travels down a 35 meter hill and to the top of the next hill. It travels with a speed of 15 m/s at the top of the second hill.

How high is the second hill? Assume no energy is lost to friction and the coaster starts from rest at the top of the first hill.

• 12.5 m

• 24 m

• 34 m

• This cannot be determined without the mass of the car.

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NGSS.HS-PS3-1

NGSS.HS-PS3-2