AP Work and Power

An object is moving in the positive x-direction while a net force directed along the x-axis is exerted on the object. The figure above shows the force as a function of position. What is the net work done on the object over the distance shown?

• F₀d

• 3F₀d/2

• 2F₀d

• 4F₀d

Which two forces do NO work on the gold block?

• F_a

• F_g

• F_f

• F_n

A 1000N force pulls a car for 300m to the left. What is the work done by the truck?

• -300,000 J

• -150,000 J

• 0 J

• 150,000 J

Tags

NGSS.HS-PS2-1

The moon orbits Earth with a circumference of 2.4 * 10⁹m, a constant speed of about 1,000 m/s, and a gravitational attraction of 2*10²⁰ N. What is the work done on the moon by the Earth?

• 0 J

• 2.4 * 10⁶ J

• 2*10²³ J

• 4.8*10²⁹ J

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

A block slides down a ramp at constant speed of 6 m/s. Which force does a negative value of work?

• F_n

• F_g

• F_f

• F_a

A block slides down a ramp at constant speed of 6 m/s. Which force does NO work?

• F_n

• F_g

• F_f

• F_a

See picture

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS2-1

A weightlifter lifts a mass of weight m to a height h in time t. Which of the following represents the power exerted by the weightlifter during the lift?

• mght

• mg/(ht)

• mgh/t

• ht/(mg)

The unit for energy and work is

• J

• N

• m/s

• m/s/s

Person A is twice the weight of Person B and climb the same hill. If person A gets the top in half the time then...

• Person A is twice as powerful
• Person B is twice as powerful
• Person A is four times as powerful
• Person B is four times as powerful 

Tags

NGSS.HS-PS2-1