Why do people lurch backwards in a bus or a train when it moves suddenly?

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.



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Because the lower part of the body comes to rest with the bus while the upper part tends to continue its motion due to inertia.

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EXPLANATION: When a bus suddenly starts moving, the passengers fall backward due to the law of inertia of rest or 1st law of Newton.

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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.

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This is because of inertia of motion. The part of our body, which is in contact with the bus, changes the direction of motion. However, the rest of the body tries to move in the same direction as before because of inertia of motion. Q.

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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.

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This is due to inertia. When the speeding bus stops suddenly, lower part of the body comes to rest while the upper part of the body tends to maintain uniform motion. Hence, the passenger's are thrown forward.

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Initially, the passengers and the bus both are moving in same direction. When the bus suddenly takes a sharp turn, the lower portion of passengers which is contact with the bus tends to move in that direction but the upper portion of the passengers throw an outside. This happens due to the INERTIA OF DIRECTION.

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If I jump up in a moving bus will I land on the same spot where? If the bus is traveling at constant speed, yes. You're moving with the same speed as the bus, and you'll keep moving with this speed while you're jumping. If the bus is accelerating while you jump, you will land in a slightly different spot.

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iv. What will happen to a person sitting inside a bus when a bus turns a corner to the left suddenly? When a bus take a sharp turn, passengers fall in the outward direction. It is due to inertia that they want to continue to their motion in a straight line and thus falls outwards.

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Where may passengers be thrown when a bus takes a bend too fast? Explanation: Turning corners or travelling around bends too quickly will push passengers towards the outside of the bend. In addition, the weight of the passengers being transferred to one side of the vehicle will make the bus even more unstable.

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