Work Calculations

How do we calculate work?

• W = F * d

• w = f * D

• W = F * D

• w = f * d

How much work is being done with 200 N of force over 426 meters?

• 85,200 J

• 45,620 J

• 90,480 J

• 62,329 J

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N

• 15 N

• 1.5 N

• 150 N

A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?

• 12 J

• 8 J

• 20 J

• 5 J

Tags

NGSS.MS-PS3-5

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 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

How much power is needed to lift an object 5 meters high with a force of 1,960 Newtons. It takes 10 seconds to lift the object. (Hint: Calculate work first, then calculate power)

• 98 Watts

• 980 Watts

• 1960 Watts

• 490 Watts

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

• 10 Watts

• 100 Watts

• 1000 Watts

• 1 Watt

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

What is the unit of work?

• Newton

• Joule

• Watt

• Meter

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5