Joules

Multiple Select

Which of the following scenarios demonstrate Gravitational Potential Energy (GPE)?

• A book sitting on a shelf

• A person running on a track

• A cat in a tree

• Ms. Migs hiking a mountain

• A dog sleeping on the floor

Math Response

A 16-kg barbell is now 0.5 m above the floor. What is it's Gravitational Potential Energy in Joules?

Type answer here

Correct Answer: 80

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Math Response

The barbell weighs 160 N and the weighlifter lifted it 0.5 m. If W = Fd, how much work did the lifter do in Joules?

Type answer here

Correct Answer: 80

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Multiple Select

Which of the following scenarios demonstrate Kinetic Energy (KE)?

• A running back going 20 yds for a touchdown

• A cliff jumper preparing to dive

• A pole vaulter sprinting down the runway

• A car waiting to start a drag race

• A drummer marching in a parade

Multiple Choice

A 750-kg elephant charges through the Savanna at 10 m/s²

What is the elephant's Kinetic Energy?

• 3750 J

• 7500 J

• 37500 J

• 75000 J

Math Response

An engine applies a 250 N force to a car over 100 m. What is the work done by the engine in Joules?

Type answer here

Correct Answer: 25000

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Math Response

If the engine does 25000 J of work, what is the Kinetic Energy of the car in Joules?

(hint, the car has a mass of 500 kg and is moving at 10 m/s² )

Type answer here

Correct Answer: 25000

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Math Response

A book with a mass of 4.1 kg is raised a height of 2.3 meters above the ground. How much PE does the book gain in Joules?

Type answer here

Correct Answer: 94.3

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Math Response

Assume a 45 kg object has 1250 Joules of potential energy. What is its height above the ground in meters? (rounds to the hundredths)

Type answer here

Correct Answer: 2.78

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Math Response

What would be the kinetic energy of a 65 kg person who can run with a maximum speed of 13 m/s.

Answer in Joules, round to the tenths

Type answer here

Correct Answer: 5492.5

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Math Response

What is the mass of a car that is moving at 25 m/s and possesses a total kinetic energy of 1,095,000 Joules?

Type answer here

Correct Answer: 3504

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