Relative Velocity
Every motion is relative as it has to be observed with respect to an observer. Relative velocity is a measurement of velocity of an object with respect to other observer. It is defined as the time rate of change of relative position of one object with respect to another.
For example, if rain is falling vertically with a velocity `v_r` and a man is moving horizontally with `v_m`, the man can protect himself from the rain if he holds his umbrella in the direction of relative velocity of rain w.r.t. man.
Buses A and B are moving in the same direction with velocities `20 hati ms^(-1) and 15 hati ms^(-1)`, respectively. Then, relative velocity of `A w.r.t. B` is
Options:
(a) `35 hati ms^(-1)`
(b) `5 hati ms^(-1)`
(c) `5 hatj ms^(-1)`
(d) `35 hatj ms^(-1)`