Work Power

If you increase your work and decrease your time, you will have

• more power

• less power

• same amount of power

• power rating can not be determined

If you do the same amount of work as someone, but do it in less time then

• You are more powerful

• You are less powerful

• You have the same power

Jasmine and James are each lifting 10 science textbooks onto the top of a book cart. Jasmine takes half as much time to do it. Who has greater power?

• Jasmine

• James

• they are the same

The correct unit to measure power is..

• Joule

• Newton

• Watt

• Pascal

In which case is work being done:

• a student sleeps

• a student carries his chair across the room

• a student pushes a locked door that doesn't move

• a student picks up his chair

Calculate the amount of work done if you use 100 Newtons of force to push a box 5 meters across the kitchen floor.

• 250 J

• 5000 J

• 500 J

• 50,000 J

Tags

NGSS.MS-PS2-2

The rate at which work is done is

• power

• potential energy

• kinetic energy

• work

Which of the following shows work being done:

• pushing a wall

• holding a box

• picking up a pencil

• sitting in a chair

Which of these would show the most power

• picking up a light object in a long amount of time

• holding a heavy object for a long time

• picking up a heavy object in a short amount of time

• picking up a light object in a short amount of time

Tags

NGSS.MS-PS3-5

Applying a small force over a long distance can be exchanged with..

• a small force over a small distance

• a large force over a small distance

• a large force over a long distance

• You cannot change the amount of force you apply