Question

1. Calculate change in momentum of a body weighing 5 kg when its velocity decreases from 20 m/s to 0.20 m/s. (CBSE 2015)
2. Define SI unit of force. A force of 2N acting on a body changes its velocity uniformly from 2m/s to 4m/s in 10 s. Calculate the mass of the body. (CBSE 2016)
3. Which Newton’s law of Motion is applied in flight of a bird? Support your answer with a suitable reason.

Answer 1

Explanation:

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