In-class Kinetic and Potential Energy

When a pendulum swings, at which point is kinetic energy highest?

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Tags

NGSS.4-PS3-1

What is the gravitational potential energy (GPE) of a 1 kilogram pumpkin that is 1 meter above the ground?

g = 9.8 m/s²

• 9.8 Joules

• 1.0 Joule

• 0.10 Joule

• 11.8 m/s²

A cat that weighs 26 N sits on a 2 m tall shelf. How much gravitational potential energy does the cat have?

• 52 J

• 13 J

• 500 J

• 5.3 J

How high is the witch flying if she has 7350 J of gravitational potential energy and a mass of 50 kg?

• 15 m

• 56 m

• 367500 m

• 147 m

The 12-foot tall skeleton from Home Depot has a mass of 30 kg and is chasing you at 5 m/s. What is its kinetic energy?

• 375

• 750

• 75

• 460

A bat is flying at a constant speed of 8.0 m/s. It has a kinetic energy of 12.8 J. What is its mass?

• 3.2 kg

• 51.2 kg

• 2.0 kg

• 0.4 kg

A 50kg person is running from a zombie and has 1225 J of kinetic energy. What is the person's velocity?

• 7 m/s

• 49 m/s

• 2401 m/s

• 12 m/s

A 0.40 kg bat is flying at a speed of 8.0 m/s. The bat flies 10 meters above the ground. What is the bat's TOTAL MECHANICAL ENERGY?

• 12.8 J

• 1.2 J

• 39.2 J

• 52

A ghost flying through the air weighs 1.5 N and has 15 J of potential energy. How high is it flying through the air?

• 10 m

• 22.5

• 0.1 m

• 16.5 m

A pumpkin sits at the top of a hill. Its potential energy is 1000 J. How much kinetic energy does it have after it rolls half way down the hill?

• 1000 J

• 500 J

• 2000 J

• 250 J