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 (5 kg) (1m/s) + 1 (kg)(0m/s) = (5kg + 1 kg)v
 5kg m/s = (6 kg)v
 v= 5/6 ms

 (2m/s) + ( 1m/s) = (1m + 1m) v
 3 m/s = m (v)
1/2 m/s




the same amount as for half of the work in the half of the time

twice as much of potential energy






twice as far as the slower arrow




a cannon has more mas than the ball









