What happens to passengers standing when a bus at rest suddenly accelerates?

When a bus starts suddenly,its passengers tend to fall backwards because due to their inertia, the passengers tend to remain in a state of rest even when the bus starts moving.



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But, when the bus suddenly starts or speeds up, the lower half of the passenger's body comes in motion in the forward direction but the upper half still remains at rest due to inertia of rest. Hence, the passengers are thrown backward when a stationary bus suddenly speeds up.

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When the bus accelerates from rest: When a bus abruptly starts moving, the passengers tend to slide backward due to inertia, as the passenger's inertia tends to oppose the bus's forward motion. Hence, the passenger tends to fall back when the bus accelerates forward.

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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 the upper part of the body has a tendency to remain in the state of rest due to inertia of rest, and hence falls ...

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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.

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Standing passengers are susceptible to suffering falls and other injuries, particularly elderly people. Shorter people and children may not be able to reach ceiling-mounted handles, straps, or rails.

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9 Things Not to Do on a Bus
  • Avoid eating foods that are particularly smelly as it will cause the entire bus to smell.
  • Keep the volume down on your headphones so you don't disturb other passengers.
  • Don't put your feet on the chair of the person in front of you.
  • Keep your items confined to your one seat.


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Since the bus is no longer moving as fast as that, you fly forward relative to the bus, until you hit something that stops you. This is a direct consequence of Newton's First Law: since there are no outside forces acting on you, you continue moving in a straight line at a constant speed.

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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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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.

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The man jumping out from a moving bus possesses the inertia of motion. As the man lands on the gorund, feet come to rest immediately while the upper part of body continue to move due to inertia of motion and hence the person may fall forward.

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