Increasing the force applied to an object decreases the work done on an object.

Power is the rate at which is done.

When a system does work, the energy of a system increases.

Lifting an object represents work done against gravity.

Work output can exceed work input.

Increasing the time in which work is done also increases power.

Increasing the distance an object moves requires more work.

Which two objects have the same amount of work done on them? 

Which object has the most amount of work done on it?

Which two objects have the same power?

Which object has the least power?

 Which object has the most power?

How much work is done against gravity lifting a 2 kg-sack of groceries a distance of 2.5 meters?

A machine exerts a force of 300 N to push a box 30.0 m horizontally in 3.00 s. Calculate the power of the machine.