Energy, Work, Power

The unit used to measure work is the 

• Watt

• Newton

• Joule

• meter

A force exerted over a distance to move an object is ______________________.

• power

• work

• momentum

• Watt

 Work done = Force x _________

• a. distance

• b. acceleration

• c. velocity

• d. speed

A 5000N block is lifted 10 m. How much work was done?

• 50000 J

• 5000 J

• 500 J

• 50 J

W=125 J
d=10 m
F=???

• 12.5 N

• 1250 N

• 0.08 N

• 135 N

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

If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?

• 272 m

• 17 m

• 4.05 m

• 272 cm 

A girl pushes a box across the floor. Did she do work?

• no

• yes

Which situation is work not done?

• lifting a 20 pound box off the floor

• holding a 20 pound box above the floor

• sliding a 20 pound box across the floor

• sliding a 20 pound box up an inclined plane

W= 20 Joules
F= .5 Newtons
D=??

• 40 Newtons

• 10 Newtons

• 40 Kilometers

• 10 Kilometers