Question

A pitcher exerts 100.0 N of force on a ball with a power output of 4,500 W. What is the velocity of the ball?

0.02 m/s, 45 m/s, 450 m/s, or 4500 m/s

?? :/ thank you!

Answer 1

here we have the subsequent relationship between power P, force F and velocity v:
\[P = Fv\]

Answer 2

so:
\[v = \frac{P}{F}\]

Answer 3

ok! what do we plug in? :/

Answer 4

here is next step:
\[v = \frac{P}{F} = \frac{{4500}}{{100}}\]

Answer 5

oh! so we get 45? is 45 m/s our solution?

Answer 6

yes!

Answer 7

yay!! thank you:)

Answer 8

:)