Question

2.
What is the cause of heat generation in the following situations:
(a) We apply brakes on our fast moving car.
(b) People often jump up and down to feel warmer in cold weather.
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Answer 1

Explanation:

1. force of friction between the tyre and the road
2. muscular energy

Answer 2

Answer:

(a) Because of friction in two surface.

(b) When we jump our body temperature rises that's why we feel warm.