Question

You are seated in a bus and notice that a hand strap that is hanging from the ceiling hangs away from the vertical in the backward direction. From this observation, you can conclude that
A. the velocity of the bus is backward.
B. the velocity of the bus is forward.
C. You cannot conclude anything about the direction of the velocity of the bus.

Answer 1

Answer:C

Explanation:

It is given that hand strap moves from the vertical in the backward direction.

The direction of strap depends upon the acceleration of bus i.e. if bus is accelerating in forward direction then strap will move in backward direction and vice-versa.

The reason for moving backwards is due to the psuedo acting on strap which bends the strap in backward direction

angle of inclination is given by $\tan \theta =\frac{a}{g}$

where a=acceleration of bus

$\theta$=inclination of strap from vertical

so we cannot conclude anything about the direction of the velocity of the bus