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Q.

True or false?
A lot of energy is wasted due to friction.

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a

True

b

False

answer is A.

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Detailed Solution

Since friction is an opposing force, a lot of energy is spent to overcome the force. For example, when a car is moving on a road, friction opposes the motion of the car. Due to this, the engine of the car needs to spend extra energy in order to maintain the speed. Therefore, we can say that a lot of energy is wasted due to friction. However, it is important to note that without friction a car cannot move on the road. Hence we say that friction is a necessary evil.

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