Work Practice Problems

What is the formula for Work?

• W = F + d

• W = Fxd

• W = F/d

• W = F-d

Tags

NGSS.HS-PS2-1

Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?

• 0J

• 30N*m

• 10J

• 200N*m

Answer explanation

Work = Force x Distance (Displacement)

W = 20N x 10m

W = 200N*m

How much work does an elephant do while moving a circus wagon 20 meters with a pulling force of 200N?

• 220J

• 4000J

• 400N*m

• 180N*m

Answer explanation

Work = Force x Distance (Displacement)

W = 200N x 20m

W = 4000N*m or 4000J

Alex applies 350N of force to move his stalled car 40m, how much work did Alex do?

• 14,000J

• 1400N*m

• 310N*m

• 0J

Answer explanation

Work = Force x Distance (Displacement)

W = 350N x 40m

W = 14,000N*m or 14,000J

Amy uses 20N of force to push a lawn mower 10 meters. How much work does she do?

• 10J

• 10N*m

• 200N*m

• 30J

Answer explanation

Work = Force x distance (displacement)

W = 20N x 10m

W= 200N*m or 200J

Joe balances a coin using 2N of upward force on the tip of his finger. He holds it 1 meter above the surface of the table. How much work is Joe doing?

• 0J

• 2J

• 2N*m

• 3N*m

Answer explanation

Work = Force x distance (displacement)

W = 2N x 0

W= 0N*m or 0J

Joe is balancing the coin on his finger. Although the coin is being balanced 1 meter above the surface of the table it is no longer being displaced or moved. Therefore there is no work being done to the coin at this point.

What is the SI unit for Work?

• J

• N

• cm

• g

Is work being done to the object?

• Yes

• No

Is work being done to this object?

• Yes

• No

Is work being done to this object?

• Yes

• No