PE & KE Calculations Review

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

KE = 1/2 m s²

You serve a volleyball with a mass of 2100 g. The ball leaves your hand with a velocity of 30 m/s. The ball has ____________ energy. Calculate it.

• 2,400 joules

• 630,000 joules

• 63,000 joules

• 945,000 joules

• Potential Energy
• Kinetic Energy

• Potential Energy
• Kinetic Energy

At which point is potential energy greatest?

• W

• X

• Y

• Z

The faster an object moves, the ________ kinetic energy it has.

• more

• less

• none of the above

• same

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

• 1
• 2
• 3
• 4

What would have the greatest kinetic energy?

• A car driving down a hill.
• A person running down a hill. 
• A ball rolling down a hill. 
• leaves rolling down a hill 

A baseball held by a pitcher has _____________energy.

• Kinetic
• Chemical 
• Potential
• Thermal

Explain what happens to the potential energy of a rock as it falls off the side of a cliff.

• The kinetic energy decreases as the potential energy increases.
• The kinetic energy decreases as the potential energy decreases.
• The potential energy decreases as the kinetic energy increases.
• The potential energy decreases as the kinetic energy decreases.