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## Homework Statement

A ball with a mass of 100g is moving with a velocity of 1 m/s . It collides into a wall, from which it bounces off with the same speed and the same angle. Calculate the change in momentum if

a) it falls perpendicular to the wall (correct answer 0.2kg*m/s)

b) it falls with an angle of 30° (correct answer 0.17 kg*m/s)

I would aprecciate if someone could help me solve this. We only started covering this topic today and I didn't quite understand it.

P.S if the writting seems strange/incorret I am very sorry it's hard to translate from Slovenian

## Homework Equations

P=m*v

P=m*v*30cos

## The Attempt at a Solution

for a)I have tried using this equation

P=m*v

which got me

P=0.1kg*1m/s=0.1Ns (I am supposed to get 0.2Ns)

for b) I tried

P=0.1kg*1m/s*30cos=0.086Ns.(I am supposed to get 0.17 Ns)