Answer
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Hint:We know Newton’s first law of motion tells us about the concept of inertia. In which it defines that, a body on its own can’t set back to motion and the same a body cannot stop itself from motion on its own. For all the motions the body requires an external force. The capacity of the body to withstand the same state of motion is termed as inertia. The more the mass a body possesses, the more inertia it has.
Complete answer:
When a car accelerates forward, the people sitting in the car experience a jerk backwards. This happens because, as initially the car plus the person system was at rest.But when the car accelerates the feet of the person are only in contact with the car and not the whole body. Due to inertia the body wants to remain at rest but as the feet accelerate with the car.
The car moves forward and the neck remains backward as the feet are in contact they make the neck also to travel forward. This process takes some time and results in a backward jerk. The neck wants to be in rest but the motion moves it forward.
Hence, the correct answer is option D.
Note:Inertia is also useful to us in our daily lives. As when we dust carpet the dust particle remains at rest just the carpet moves which results in cleaning of carpet. And the same case happens when a moving car stops suddenly the passengers experiences a forward jerk as their body is moving forward and the car stops which makes the feet stop but the body is still in motion forward.
Complete answer:
When a car accelerates forward, the people sitting in the car experience a jerk backwards. This happens because, as initially the car plus the person system was at rest.But when the car accelerates the feet of the person are only in contact with the car and not the whole body. Due to inertia the body wants to remain at rest but as the feet accelerate with the car.
The car moves forward and the neck remains backward as the feet are in contact they make the neck also to travel forward. This process takes some time and results in a backward jerk. The neck wants to be in rest but the motion moves it forward.
Hence, the correct answer is option D.
Note:Inertia is also useful to us in our daily lives. As when we dust carpet the dust particle remains at rest just the carpet moves which results in cleaning of carpet. And the same case happens when a moving car stops suddenly the passengers experiences a forward jerk as their body is moving forward and the car stops which makes the feet stop but the body is still in motion forward.
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