Answers (cont.)
n 2.) Use pbefore=pafter
Pbefore=0kg.m/s + 2kg.m/s(right)
=2kg.m/s(right)
Pafter=2kg.m/s(right)=3kg.m/s +
P(0.2kg cart)  so….p of 0.2kg cart
must be -1kg.m/s or
1kg.m/s(left)
       more…..