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Due to a teacher strike where I live, I've been trying to teach myself the momentum unit . Could anyone go through these questions with me? Or tell me what formulas I should use to solve these problems?

1. A mass of 6.3 kg traveling at 6m/s is acted on by a force giving an impulse of -31.5 N/s. What is the velocity of the mass after the impulse?

I know that I have to do something with the final momentum and the intial momentum, but I don't know what formula to use.

2. What force must be imparted to a 100g baseball to change the velocity from 40.0 m/s to -50.0 m/s in 1.2 ms?

b) what is the impulse of this force?

thanks

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# Homework Help: Momentum Questions

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