Work,Power and Energy 2

The energy associated with motion is called

• Kinetic energy
• Elastic potential energy
• Gravitational potential energy
• Nuclear energy

50 J of work is done lifting a 2.0 kg book in the air. How high was it lifted?

• 2.6 m

• 3.6 m

• 1.0 m

• 25 m

How much energy is expended when a 10.0 kg box is moved 2.0 m?

• 20.0 J

• 5.0 J

• 0.20 J

• 2.5 J

What are two things required for work to be done? Check all that apply.

• Force

• Distance

• Constant Speed

• Momentum

How much work is done in holding a 15 N sack of potatoes while waiting in line at the grocery store for 3 minutes?

• 15 J
• 45 J
• 0 J
• 5 J

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N
• 15 N
• 1.5 N
• 150 N

Stored energy in the form of position or condition.

• potential energy

• kinetic energy

• momentum

• mechanical energy

What is needed to calculate work?

• force

• distance

• time

• mass

What is the potential energy of a 3kg ball that is on the ground?

• 0 J

• 3 J

• 9.8 J

• 29.4 J

A roller coaster whose average speed is 32 m/s is at the top of a 72m hill and weighs 966N. At the top of the hill the coaster car has ___________________ energy.

• only kinetic energy

• only potential energy

• mostly kinetic energy

• both kinetic and potential energy