Question

A child kicks a stone along the sidewalk with a force of 520 newtons. The stone travels 1.5 meters in 0.30 seconds. How powerful is the child's kick?

2,600 W
1,700 W
47 W
1.5 W

Answer 1

the answer should be 2,600 W .

Answer 2

2,600 W

Step-by-step explanation:

The power can be expressed as the product between the force applied and the velocity of the object:

`P=Fv`

where F is the force applied and v is the velocity.

We already know the force, F=520 N, while we can find the velocity of the stone by dividing the distance covered by the time taken:

`v=(d)/(t)=(1.5 m)/(0.3 s)=5 m/s`

So now we can use the first equation to find the power:

`P=(520 N)(5 m/s)=2600 W`