AP Physics Energy

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing

• pushing down on a heavy stack of books lying on a table

• dropping a stack of books onto a table

• picking up a pile of books from the floor

Which are correct units for work?

• N x s

• N x m

• J/s

• W

Which are correct equivalent units for power?

• N x s

• N x m

• J

• J/s

Which principle states that whenever work is done, energy changes form?

• Law of Conservation of Energy

• Work-Energy Theorem

• Newton's Fourth Law

• Efficiency

Tags

NGSS.HS-PS3-3

If you pull the trolley along a flat floor horizontally. Which force do you use to calculate the work done.

• Weight

• Pulling force

• Normal forrce

• Friction

Tags

NGSS.MS-PS2-2

Winnie and Eeyore have the same mass and have just finished climbing the same tree, but Eeyore was 4 seconds faster then Winnie. Who used the most power?

• Winnie as he took the longer time and did the same amount of work as Eeyore

• Winnie as he is shorter and could grip more as so did more work overall

• Eeyore as he did the same amount of work as Winnie but in a shorter time.

• Eeyore as he did more work than Winnie but in a shorter time

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

If the net work done on an object is negative, then the object’s kinetic energy...

• decreases

• remains the same

• increases

• is zero

On a force versus change in position graph, the area under the curve is a representation of...

• power

• KE

• PE

• work

How far does a car that pulled with a 5,000 N force go if 18,000 J of work is done on it?

• 3.8 m

• 3.7 m

• 3.2 m

• 3.6 m

Tags

NGSS.HS-PS2-1

What is the weight of an object if 75 J of work is done to lift it uniformly 6.0 m

• 13 N

• 450 N

• 1.3 kg

• 130 kg