Work Calculations

The SI unit for work is .

Tags

NGSS.HS-PS2-1

When calculating work, force is measured in

• joules.

• Newtons.

• foot-pounds.

• none of the above.

Work equals force multiplied by

If you do 40 joules of work on an object to move it 2 metres, you apply Newtons of force to the object.

Clarissa helps her mum put the lawn mower in the back of her mum's truck. They lift the mower up from the ground to the tray of the truck, which is 1.1 metres above the ground. If she does 528 joules of work climbing into the tray, how much does she weigh?

• 500 N

• 480 N

• 395 N

• 400 N

Tags

NGSS.MS-PS3-5

You can calculate force from work and distance with the equation

• Force = Work /Distance

• Force = Work x Distance

• Force = Distance / Work

• Force = Weight + Distance

Clarissa helps her mum put the 200N lawn mower in the back of her mum's truck. They lift the mower 1.1m into the truck. How much work do Clarissa and her mum do?

• 140 J

• 220 J

• 180 J

• 240 J

Tags

NGSS.MS-PS3-5

Jason pushes a lawnmower 95 metres with a force of 160N. How much work has he done?

• 1520 J

• 850 J

• 8500 J

• 5800 J

• 15200 J

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A weightlifter lifts a 600 newton weight 1.5 meters off the ground. How much work has she done?

Tags

NGSS.HS-PS2-4

You generate 10 Watts of power when you move a weight in 4 seconds. How much work did you do?

Tags

NGSS.HS-PS3-1