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

Answer:

When brakes are applied on our fast moving car, the brakes produce heat due to friction. People often jump up and down in cold weather to feel warm because the body produces heat while jumping, this heat keeps them warm. When we apply brakes in a moving car heat produces due to friction.

Answer 2

ANSWER

When brakes are applied on our fast moving car, the brakes produce heat due to friction. People often jump up and down in cold weather to feel warm because the body produces heat while jumping, this heat keeps them warm. When we apply brakes in a moving car heat produces due to friction