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Passengers sitting in a stationary car experience a jerk when the car suddenly starts. This is due to _____

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Passengers sitting in a stationary car experience a jerk when the car suddenly starts. This is due to _____

(a) Inertia of motion

(b) Inertia of rest

(c) Inertia of turning

(d) Inertia of acceleration

The question was asked during an interview.

This intriguing question comes from Newton’s First Law of Motion in chapter Laws of Motion of Physics – Class 11

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Best answer
The correct option is (b) Inertia of rest

Best explanation: When the car starts, the people sitting in it experience a jerk. This is because, while the car was stationary, the people were stationary with it. Hence, they were having an inertia of rest. When the car starts, the inertia of the car changes from that of rest to that of motion. But the inertia of the people still remains that of rest. Hence, they experience a jerk.

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