A 769 kg car stopped at an intersection is rear-ended by a 1580 kg truck...

Novfal0

New member
...moving with a speed of 14.5 m/s.? A 769 kg car stopped at an intersection is rear-ended by a 1580 kg truck moving with a speed of 14.5 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find the final speed of both vehicles after the collision.

1)Car

2) Truck

I tried solving this but kept getting it wrong because I think I was using an elastic set-up...Please help
 
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