A bus starts to move. A passenger sitting in it feels a back jerk,why?

Question

inertia or psuedo force.if due to inertia then why not psuedo force

Answer 1

New ton'S first law of motin says evry thing continues tend to rest or continue to motion unless it is impressed by some external force. So it happen to the passenger sitting feels the back jerk.

And also the law of inertial also holds true for this effect.

Answer 2

Nothing is ever due to "pseudoforce". That is what the "pseudo" means. It means it doesn't really exist...it just is that our brain is accustomed to thinking about it in terms of a force, so our brain gets an illusion that a force causes it.







If you look at it from the perspective of someone standing still on the sidewalk, the passenger (as per the passenger's inertia) is "trying" to not change speed (remain at rest). That is what bodies with mass do...they try to stay at the same speed in the same direction. That is just a natural property of all matter. We don't know why bodies have that as the default condition of motion...they just do. We call that ignorance...inertia

Answer 3

Inertia.

Newton's second law of motion: A body of mass m subject to a net force F undergoes an acceleration a that has the same direction as the force and a magnitude that is directly proportional to the force and inversely proportional to the mass, i.e., F = ma. Alternatively, the total force applied on a body is equal to the time derivative of linear momentum of the body.



Basically, the object tends to keep it's previous condition, to stay motionless if it was before the 'force', or to continue moving the same way (at the same speed and direction).

Answer 4

That is due to inertia..



Newton's first law of motion states that an object remains in the state of rest or of uniform motion in a straight line unless compelled to change that state by an applied unbalanced force..



Inertia:

The tendency of a body to resist acceleration; the tendency of a body at rest to remain at rest or of a body in straight line motion to stay in motion in a straight line unless acted on by an outside force.



Pseudo force:

The physically apparent but nonexistent force needed by an observer in a non inertial frame to make Newton's laws of motion hold true. The centrifugal force is a pseudo force. Also called fictitious force.



That's why it is Because of Inertia..

Answer 5

A person standing in a stationary bus falls back due to inertia of rest.It is Third law of motion.when a bus moves our feet in contact with the floor of bus tries to move but our upper body remains at rest only & thus we experience a jerk in the direction opposite to which bus move. This can also be explained by IMPULSIVE FORCE which is f.dt.& also by momentum conservation.

Answer 6

IT IS DUE TO INERTIA OF rest.while the bus starts moving,the sit moves with bus.but due to inertia of rest,man does not move.so he feels a back jerk.no,it is not due to pseudo force because,we think about pseudo force when the body is moving with constant acceleration.

Answer 7

This is due to inertia of rest.

Answer 8

cuz the driver gave to much fuel for a smooth start, or he popped the clutch instead of letting it out slowly.

Answer 9

It's lupus.