Power, work, force problems

Work is the product of?

• Speed and force
• Force and distance
• Power and force
• Motion and force

Which of the following is a unit of work?

• joule
• watt
• horsepower
• newton

Power is equal to work divided by

• time
• force
• distance
• mechanical advantage

What is the work done by the man?

• 0 J
• 65 J
• 6500 J
• 0.0065 J

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

• 50000 J
• 5000 J
• 500 J
• 50 J

If you push a coffee mug 1.4 m using a force of 5 N, the work done on the mug is?

• 7 J

• 6 J

• 8 J

• 9 J

W = 500 Joules 
t = 25 seconds
P = ???

• 0.05 W
• 20 W
• 12500 W
• 2000 W

If 68 W of power is produced in 18 seconds, how much work is done?

• 1,224 J
• 0.264 J
• 3.77 J
• 12.24 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

Which of these is a measurement of power?

• 100 joules
• 100 watts
• 100 meters per second
• 100 hertz