Suppose a truck is moving with acceleration a.Will truck experience a pseudo force or the materials inside the truck will experience a pseudo force or both?

Asked by Rohan Mehra | 12th Mar, 2011, 09:58: PM

Expert Answer:

Dear student,
 
Observers inside a closed box thais moving with a constant velocity cannot detect their own motion; however, observers within aaccelerating reference frame can detect that they are in a non- inertial reference frame from the fictitious forces that arise. Thecan even map out the magnitude and direction of the acceleration at every point with a plumb bob and a protractor. 
 
When a car accelerates hard, the common humaresponse is to feel "pushed back into the seat." In an inertial frame of reference attached to the road, there is no physical force moving the rider backward. However, in the rider's non-inertiareference frame attached to the accelerating car, there is a backward fictitious force. From the point of view of the interior of the car, an
accelerating reference frame, there is a fictitious force
pushing the passenger backwards, with magnitude equal to
the mass of the passenger times the acceleration of the
car. This force pushes the passenger back into the seat,
until the seat compresses and provides an equal and
opposite force. Thereafter, the passenger is stationary in
this frame, because the fictitious force and the (real) force
of the seat are balanced.From the point of view of the interior of the car, an
accelerating reference frame, there is a fictitious force
pushing the passenger backwards, with magnitude equal to
the mass of the passenger times the acceleration of the
car. This force pushes the passenger back into the seat,
until the seat compresses and provides an equal and
opposite force. Thereafter, the passenger is stationary in
this frame, because the fictitious force and the (real) force
of the seat are balanced.
 
Hope this helps.
Thankyou
Team
Topperelarning.com

Answered by  | 12th Mar, 2011, 11:00: PM

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