Calculating average forces on an Object

Tags:
1. Oct 30, 2016

JustynSC

1. The problem statement, all variables and given/known data
A 0.140kg baseball traveling 35.0 m/s strikes the catcher's mitt, which in bringing the ball to rest, recoils backward 11.0cm. What is the average force applied by the ball on the glove

2. Relevant equations
F=ma; FAB=-FBA

3. The attempt at a solution
Not sure where to start for this one

Mod Edit: missing velocity value added to problem statement after it was supplied by the OP.

Last edited by a moderator: Oct 30, 2016
2. Oct 30, 2016

Staff: Mentor

For starters you need to supply the initial velocity. It looks like it got lost between your fingers and the keyboard.

By the forum rules you need to make some attempt. What kinematic facts about the ball's motion can you derive from the given information?

3. Oct 30, 2016

JustynSC

Oops. Yes the initial velocity is equal to 35.0m/s
My frist attempt would have been a free body diagram depicting a ball traveling at the suggested speed coming in contact with the glove (or any object that acts against the ball's velocity. This in turn means there must be an opposing force (acceleration in the opposite direction of the ball's travel.) But since I don't know the acceleration, (or the time interval it took for the velocity to reach )m/s from 35m/s. how can I calculate that piece of information?

4. Oct 30, 2016

Staff: Mentor

Make a list of the SUVAT equations (look it up) and keep it handy. There is enough information given to find the acceleration if you choose the right equation from the list.

5. Oct 30, 2016

JustynSC

Hey thanks for that I have never heard of the phrase SUVAT equations. This was greatly helpful!