An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. the heavier fragment slides 5.50 m before stopping. how far does the lighter fragment slide?
Answer:
conserve momentum:
m*v = 7m*V
so
v = 7V
you can calculate the KE of each piece, eg
larger piece KE = ½*7m*V²
and that's equal to the friction work = µ*7m*g*8.30
mass cancels again
