Work Done and Power

If you push a trolley with a force of 60 N for 2 m, how much work have you done?

• 120 J

• 30 J

• 120 N

• 30 N

Tags

NGSS.MS-PS3-5

A blender performs 2000 J of work in 10 seconds. What is its power?

• 2000 W

• 200 W

• 10 W

• 100 W

What is the unit for work (energy)?

• Newton (N)

• Joule (J)

• Watt (W)

• Meter (m)

Tags

NGSS.MS-PS3-5

If a machine does 100 Joules of work in 10 seconds, what is its power output?

• 10 Watts

• 100 Watts

• 1000 Watts

• 1 Watt

A kid applies a force of 70 N to a ball over 1.1 meters. How much work did he do on the ball? 

• 77 J

• 7.7 J 

• 0.7 J 

• 770 J 

If a person exerts a force but the object does not move, how much work is done?

• The work done is equal to the force exerted.

• The work done is infinite.

• The work done is zero.

• The work done cannot be calculated without time.

If a person lifts a box with a force of 500 Newtons to a height of 2 meters, how much work is done?

• 500 Joules

• 1000 Joules

• 250 Joules

• 100 Joules

Tags

NGSS.MS-PS3-4

If a person applies a force of 20 N to push a cart for 3 meters, how much work is done?

• 5 Joules

• 17 Joules

• 23 Joules

• 60 Joules

What is the unit of work?

• Newton

• Joule

• Watt

• Meter

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Which of the following is the best example of work being done.

• standing

• lifting a box

• Walking

Answer explanation

Work done requires an object being moved