7.1 Review of KE & GPE

You serve a volleyball with a mass of 2 kg. The ball leaves your hand with a speed of 30 m/s. What is the KE of the ball?

• 900 J
• 1800 J
• 60 J
• 30 J

There is a bell at the top of a tower that is 45 m high. The bell weighs 100 kg. What is the potential energy of the bell?

• 980 J
• 441 J
• 4,500 J
• 44,100 J

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. What is the KE of the car?

• 22,400 J
• 44,800 J
• 896,000 J
• 1,792,000 J

Which of the following has the GREATEST IMPACT on the kinetic energy of an object?

• Mass 
• Velocity
• Height
• The acceleration due to gravity

The acceleration of an object due to gravity on Earth is...

• 8.9 m/s²
• 9.8 m/s²
• It depends on the mass of an object
• Equal to its kinetic energy

What is the correct unit for energy?

• meters (m)

• kilogram meters per second (kg m/s)

• Newtons (N)

• Joules (J)

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

• more
• less
• none of the above
• all of the above 

What is the equation for calculating gravitational potential energy

• mv

  or

  mv2

• 1/2 mv2

• ham

  or mgh

• Ft

____________ is the ability to do work or cause change.

• Energy

• Force

• Friction

• Motion

What is the equation for calculating kinetic energy?

• mv

• 1/2 mv^2

• ham

  or mgh

• Ft