c0c0pIe Group Title a ball of mass 0.2 kg strikes a wall when moving horizontally at 12m/s. if the ball rebounds horizontally at 8m/s, find the impulse exerted by the wall 2 years ago 2 years ago

1. hosein

2. hosein

if yes j is:$\Delta p=j \rightarrow p _{2}-p _{1}=j$ $p _{2}=mv _{f}$ $p _{1}=mv _{i}$so j yeilds -0.8 neg sign for direct of j i thnk

3. din

I=ft ft = mv-mu ft = (0.2)(-8)-(0.2)(12) = -2.56N*s... i think so..

4. din

sorry...the answer is -4J / 4N*s