Question

Carter pushes a bag full of basketball jerseys across the gym floor. The he pushes with a constant force of 21 newtons. If he pushes the bag 9 meters in 3 seconds, how much power does he use? (Hint: 1 watt = 1 .

Answer 1

Answer: 63 W

Step-by-step explanation:

Power is defined as the amount of work done divided by the time taken:

`P=(W)/(t)`

where W is the work done, and t is the time taken.

The work done is given by the product between the force applied and the displacement of the bag:

`W=Fd=(21 N)(9 m)=189 J`

So, the power in this case is

`P=(W)/(t)=(189 J)/(3 s)=63 W`