# Homework Help: Change in momentum of baseball being struck

1. May 21, 2012

### Zach Lunch

1. The problem statement, all variables and given/known data
A 0.33 kg softball has a velocity of 14 m/s at an angle of 50° below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball while it is in contact with the bat if the ball leaves the bat with a velocity of (a) 15 m/s, vertically downward, and (b) 15 m/s, horizontally back toward the pitcher?

2. Relevant equations
→P=M*→V
3. The attempt at a solution
Find the Vector for momentum before hitting the bat .33<14*cos 50, 14*sin 50>
Subtract vector for each case. a) subtract .33<0,-15> b.) subtract .33<-15,0>
Then use Pythagorean Theorem to get magnitude sqrt(x^2 + y^2) for each case.

2. May 21, 2012

### ehild

The angle is 50° below the horizontal. The vertical component of the original momentum has to be negative.

ehild

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