The explanation of, why we get thrown back with a jerk when the stationary bus we are sitting in starts moving forward is given by :
Zeroth law of gravity
Newton's first law
Newton's second law
Newton's third law
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Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2009
Newton’s first law of motion, also known as the Law of Inertia, states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. When the bus is stationary, you are also at rest relative to the ground. When the bus suddenly accelerates forward, your body, due to inertia, tends to maintain its state of rest. This relative motion causes you to feel a backward jerk with respect to the accelerating bus.