When a bus starts suddenly,the person falls backwards because of inertia of rest of passenger. This is due to the fact that because of their inertia ,the passengers tend to remain in their state of rest when the bus starts suddenly.
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This is due to inertia of rest of upper part of the passengers body when the bus or train suddenly starts moving, the lower part of the passenger's body starts moving along with the bus or train while upper part of the body has a tendency to remain in the state of rest due to inertia of rest and hence falls backward.
When the running bus stops suddenly, the passengers are jerked forward because due to inertia of motion the passengers tend to remain in their state of motion even though the bus has come to rest. Q.
To recap, Newton's first law, the law of inertia, states the following: 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 on by an unbalanced force.
Expert-Verified AnswerIf the bus suddenly moves going to North or forward, the passenger will tend to move backward or South. The passenger's movement is in opposite direction to the bus. The reason behind this one was because of the inertia in motion.
When a bus takes a turn, the centrifugal force felt by the passengers, is directed opposite to the direction of the turn. Hence, when a bus takes a right turn, the passengers inside the bus seem to lean towards left.
The energy of the bus has to go somewhere, and the momentum too, as they are independently conserved. Part of the energy goes to heat, in the brakes and on the contact ground/wheels. Heat means photons, so photons may take away some momentum. But most momentum through friction is transferred to the ground .
A getting passenger getting down from a moving bus, falls in the direction of the motion of the bus. This is because his feet come to rest on touching the ground and the remaining body continues to move due to inertia of motion.
And the bus stopped suddenly. I fell down. Because of Newton's Law of Inertia, which states: 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.
This is due to inertia of rest of upper part of the passengers body when the bus or train suddenly starts moving, The lower part of the passenger's body starts moving along with the bus or train while the upper part of the body has a tendency to remain in the state of rest due to inertia of rest, and hence falls ...