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A cart A of mass 50 g moving at a speed ...

A cart A of mass 50 g moving at a speed of 20 km/h hits a lighter cart B of mass 20 kg moving towardsd it at a speed of 10 km/h. The two carts cling to each other. Find the speed of the combined mass after the collision.

Text Solution

Verified by Experts

This is an eample of inelastic collision. As the carts move towards each other, their momenta have opposite sign. If the common speed after the collision is v , momentum conservation gives
`(50kg)(20km/h)-(20kg)(10 km/h)=(70kg)V`
or `V=80/7km/h`.
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