Question

A 2 kg car moving towards the right at 4 m/s collides head on with an 8 kg car moving towards the left at 2 m/s, and they stick together. After the collision, the velocity of the combined bodies is
a. 0
b. 0.8 m/s towards the right
c. 0.8 m/s towards the left
d. 2.4 m/s towards the right
e. 2.4 m/s towards the left

Answer

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