Work and Energy

At which point is potential energy greatest?

• W
• X
• Y
• Z

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

At which point is kinetic energy greatest? 

• W
• X
• Y
• Z

A car is pushed with a force of 700 N for 50 m. What is the amount of work done on the car?

• 3,500 J

• 35,000 J

• 14 J

• .0714 J

You have to pull a chair with 15 N of force to move it 10 meters. What was the change in kinetic energy of the chair?

• 15 Joules

• 150 Joules

• 1.5 Joules

• .67 Joules

How much kinetic energy does it take for a 500 kg motorcycle to go up a 50 m hill?

• 312,500 J

• 245,000 J

• 25,000 J

• 10 J

____________ is the ability to do work or cause change.

• Energy

• Force

• Friction

• Motion

A 10.0 kg box is pushed with a force of 10 N and accelerated from 4.0 m/s. While in motion the box moved 6 meters. What is the amount of work done on the box?

• 50 J

• 60 J

• 20 J

• 45 J

The amount of work done by an accelerating car can be found using

• W = KE_f - KE_i

• F⋅d = KE

• W = mgh_f - mgh_i

• W = F*t

A 12 kg book is pushed from rest to a final velocity of 10 m/s. The book travels 6 m. How much force was the book pushed with?

• 600 N

• 100 N

• 200 N

• 1200 N