A girl jumps down from a moving bus, along the direction of motion of the bus, tilting slightly forward. She falls on $(a)$ a sheet of ice $(b)$ a patch of glue.

We are standing in a bus moving with constant velocity. When brakes are applied to bus we are thrown in forward direction ? Why ?

$Assertion$ : The driver in a vehicle moving with a constant speed on a straight road is an inertial frame of reference.

$Reason$ : A reference frame in which Newton's laws of motion are applicable is non-inertial

Newton's first law is applicable

A man getting down a running bus falls forward because