Question

A pitcher exerts 100.0 N of force on a ball with a power output of 450 W. What is the velocity of the ball?

A. 0.45 m/s
B. 450 m/s
C. 0.22 m/s
D. 4.5 m/s

Answer 1

Answer : The correct option is, (D) 4.5 m/s

Solution :

Formula used :

$P=\frac{w}{t}=\frac{F\times d}{t}=F\times v$

where,

w = work done

t = time taken

d = displacement

P = power = 450 W

F = force = 100 N

Now put all the given values in the above formula, we get the velocity of the ball.

$P=F\times v$

$450W=(100N)\times v$

$v=4.5m/s$

Therefore, the velocity of the ball is, 4.5 m/s