A 2 kg car moving towards the right at 4 m/s collides head on with an 8 kg car m

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 Answer 0 0.8 m/s towards the right.

0.8 m/s towards the left.

2.4 m/s towards the right.

2.4 m/s towards the left. 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 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 0 0.8 m/s towards the right.

0.8 m/s towards the left.

2.4 m/s towards the right.

2.4 m/s towards the left. 0 0.8 m/s towards the right.

0.8 m/s towards the left.

2.4 m/s towards the right.

2.4 m/s towards the left.

Explanation / Answer

By the law of momentum conservation:-

=>m1u1+m2u2 = (m1+m2)v
=>2 x 4 + 8 x (-2) = (2+8)v
=>v = -0.8 m/s
=>C. 0.8 m/s towards the left

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