momentum before: mv
momentum after: m(-v)
now just subtract to get the change.
a tennis ball of mass m strikes the massive wall with velocity v and traces the same path.calculate the change in momentum
3 answers
change in momentum =final-initial
initial =mv
final=-mv
change= -mv-(mv)=-2mv
initial =mv
final=-mv
change= -mv-(mv)=-2mv
Very nice