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A car of mass 1478 kg collides head-on with a parked truck of mass 2000kg. Spring...

A car of mass 1478 kg collides head-on with a parked truck of mass 2000kg. Spring mounted bumpers ensure that the collision is essentially elastic. If the velocity of the truck is 17 km/h (in the same direction as the car's initial velocity) after the collision, what is the initial speed of the car?

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