Work Calculations

A cat who weighs 90 N walks up a flight of stairs that are 3 m high. How much work has it done?

How much work is required to throw a football with a force of 200 N a distance of 50 meters?

A man applies a force of 100 N

to a rock for 60 seconds, but

the rock does not move.

What is the amount of

work done by the man on

the rock?

A cat lifts its body and does 270 J worth of work. This takes 9 seconds. What is the power?

A weightlifter lifts weights. She

does 700 J worth of work in 10

seconds. What is her power?

An elevator lifts a man with 200 N of force a distance of 30 m. This took 60 seconds. What is the power?

A toddler lifts a cat with a force of 20 N. He moves the cat a distance of 4 meters. This

took 10 seconds. What is the power?