## Question

###### 12. -/1 Points DETAILS SERCP114 AP.072 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER As a protest...

12. -/1 Points DETAILS SERCP114 AP.072 MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER As a protest against the umpire's calls, a baseball pitch throws a ball tight up into the air at a speed of 210 ms. In the process, he moves his hand through of 1.0m if the ball has 0.150 kg. find the force he exerts on the ball to give it this www speed

## Answers

The ball has moved a distance of 1.2 m while the acceleration happened.

The initial velocity of the ball has to be zero.

The final velocity is given to be 21.0 m/s

So, using

a = (21.0^2-0) /(2*1.2) = 183.75 m/s^2

Here, mass of the ball = 0.15 kg

So,

F = ma = 0.15*183.75 = 27.56 N

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