- #1

GiantSheeps

- 83

- 7

## Homework Statement

A(n) 0.142 kg baseball is thrown with a speed

of 19.5 m/s. It is hit straight back at the

pitcher with a final speed of 26.6 m/s.

What is the magnitude of the impulse delivered

to the ball?

Answer in units of kg · m/s

(part 2) Find the average force exerted by the bat on

the ball if the two are in contact for 0.00109 s.

Answer in units of N

## Homework Equations

F*t=mvf-mvi

## The Attempt at a Solution

m= 0.142 and vf = 26.6, so mvf = 3.772, vi = 19.5 so mvi = 2.769

3.772 - 2.769 = 1.0082

which was wrong of course...

i think i need to do something with the t in the equation, but there is no t given in the problem

i also tried it with vi = 0, since velocity would be zero while the ball s on the bat, but that answer (3.772) was wrong as well