Passengers standing in a bus are thrown outwards when the bus takes a sudden turn. This happens because of

We are standing in a stationary bus. When the bus suddenly starts,why are we thrown in the backward direction?

$A$ particle is moving with a constant speed along a straight line path. $A$ force is not required to

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R.$
Assertion $A:$ An electric fan continues to rotate for some time after the current is switched off.
Reason $R:$ The fan continues to rotate due to inertia of motion.
In the light of the above statements,choose the most appropriate answer from the options given below.

Which one of the following persons is in an inertial frame of reference?

When a bus suddenly takes a turn,the passengers are thrown outwards because of