Question

A hockey puck is pushed by a stick with a force of 750 newtons. The puck travels 2.0 meters in 0.30 seconds. How powerful is the push? (Ignore frictional effects.)

Answer 1

The work done by the force pushing the puck is equal to the product between the force and the distance covered:

`W=Fd=(750 N)(2.0 m)=1500 J`

And the power is the work done per unit time:

`P= (W)/(t)`
and using t=0.30 s, we find the power:

`P= (1500 J)/(0.30 s)=5000 W`