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A 1,000-kg car moving east at 90 km/h collides head-on with a 1,500-kg car moving west...

A 1,000-kg car moving east at 90 km/h collides head-on with a 1,500-kg car moving west at 50 km/h, and the two cars stick together. (a) Which way does the wreckage move and with what initial speed? (b) How much KE is lost in the collision?

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