Work, Energy and Power MC Review

Check all that are true about Work.

• Symbol is W

• Unit is J

• Unit is W

• W = Fd

Tags

NGSS.HS-PS3-3

Check all that are true about Potential Energy.

• Symbol is PE

• Unit is J

• Unit is W

• PE = mgh

Check all that are true about Power.

• How fast work is done

• Symbol is P

• Unit is J

• Unit is W

• P = W/t

Check all that say work is being done.

• A Force causes and object to move.

• The force and the displacement are parallel

• The force and the displacement are perpendiular

• A force is applied but the object doesn't move.

Work is NOT done when...

• A boy pushes on a parked car.

• A girl lifts a book off the floor.

• A man pushes a box across the carpet.

• Friction causes a ball to stop rolling.

Tags

NGSS.MS-PS2-2

If you do 100 J of work to lift a TV up to the second floor, how much work would it take to lift the TV up to the 4th floor?

• 100 J

• 200 J

• 300 J

• 400 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

If you do 100 J of work to lift a TV up to the 2nd floor, how much potential energy will the TV have?

• 100 J

• 200 J

• 300 J

• impossible to tell

Tags

NGSS.HS-PS3-1

Large man: Fw=1000N, time = 5 seconds

Small child: Fw=400N, time = 1 second

Both people walked up the same set of steps (1 m). Who did the most work?

• Large man because he weighs more

• Small child because she weighs less

• Large man because he took more time.

• Small child because she took less time.

Tags

NGSS.MS-PS2-4

Large man: Fw=1000N, time = 5 seconds

Small child: Fw=400N, time = 1 second

Both people walked up the same set of steps (1 m). Who developed the most power?

• Large man because he did more work in less time

• Small child because she did less work in less time

• Large man because he did less work in more time.

• Small child because she did more work in less time.

Joey pushes a box horizontally for 2 m with a horizontal force of 10N. How much work did he do?

• 0 J

• 5 J

• 10 J

• 20 J