Calculating Potential and Kinetic Energy

An 2 kg apple is hanging in a tree, 3 m off the ground. What is the gravitational potential energy (gravity = 9.8 m/s²) of the apple?

Gravitational potential energy depends on the strength of gravity, ________ and ________ of the object.

• height and mass

• friction and movement

• mass and movement

• height and friction

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NGSS.MS-PS2-4

There is a clock at the top of a tower that is 45m high. The clock weighs 20 kg. Calculate its potential energy. Remember g=9.8 m/s

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NGSS.MS-PS3-2

What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?

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NGSS.MS-PS2-4

NGSS.MS-PS3-2

Between a bowling ball and a soccer ball, which one has more kinetic energy and why?

• a bowling ball because it has more mass

• a bowling ball because it is smaller

• a soccer ball because it has more mass

• a soccer ball because it is smaller

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

A cheetah can run briefly with a speed of 31 m/s. Suppose a cheetah with a mass of 47 kg runs at this speed. What is the cheetah’s kinetic energy?

• 1457 J

• 728.5 J

• 45,167 J

• 22,583.5 J

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NGSS.MS-PS3-1

A polar bear has an average mass of 500 kg. If its maximum kinetic energy is 60500 J, what is its top speed?

• 242 m/s

• 121 m/s

• 15.56 m/s

• 15,125,000 m/s

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NGSS.MS-PS3-1

At which point is potential energy greatest?

• W
• X
• Y
• Z

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NGSS.MS-PS3-2

Energy can be _____________ or changed from one type to another.

• destroyed
• transferred
• created
• ignored

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NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

KE = 1/2 m s²

A 10 gram ball is rolling at 3 m/s. The ball has __________ energy. Calculate it.

• 30 joules

• 60 joules

• 45 joules

• 15 joules

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4