Baseball change of direction Force and Impulse

[physicsballer2]

A softball of mass .4kg is pitched at a speed of 24 m/sec, the batter hits it back directly at the pitcher at a speed of 20 m/s. The bat acts on the ball for .015 secs. A: What is the impulse imparted on the ball? B: What is the average force exerted by the bat on the ball?

pi= mv pi= (.4)(25)= 10

pf=mv pf= (.4)(20)= 8

F=Δp/t =10-(-8 )/ .015 = 1200 N
I= Δp = 18 NS

Is this right?

 

[barryj]

change 25 to 24 per the problem

 

[rude man]

A softball of mass .4kg is pitched at a speed of 24 m/sec, the batter hits it back directly at the pitcher at a speed of 20 m/s. The bat acts on the ball for .015 secs. A: What is the impulse imparted on the ball? B: What is the average force exerted by the bat on the ball?

pi= mv pi= (.4)(25)= 10

pf=mv pf= (.4)(20)= 8

F=Δp/t =10-(-8 )/ .015 = 1200 N
I= Δp = 18 NS

Is this right?

Almost. You used 25 m/s when it's 24 m/s. You did part B before part A. Otherwise OK.