Question

A 1000-kg car is moving east at 80 km/h collides head on with a 1500-kg car moving west at 40 km/h, and the two cars stick together. Which way does the wreckage move and with what initial speed?
no idea
a) 14m/s (conservation of momentum, 2200*60+1300*30=(2200+1300)*v )
b) 47500
c) 2.8 * 10^4

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