A 0.73-kg magnetic target is suspended on a string. A 0.025-kg magnetic dart shot horizontally, strikes the target head-on. The dart and the target together acting like a pendulum, swing 12.0 cm above the initial level before instantaneously coming to rest.
A) Sketch the situation and choose a system
B) Decide what is conserved in each part and describe decision
C) What was the initial velocity of the dart?