Question

A train moves southwards with speed 72 km h+!, while
a car moves towards east with speed 36 km h-? The
velocity of train w.n.t. car (in m/s) is (consider east in
+x and south in - y direction)

Answer 1

Answer: 10√5 m/s

Explanation: TRAIN VELOCITY=72km/h(-j)=-20m/s(j)

                      CAR VELOCITY=36km/h(i)=10m/s(i)

VELOCITY OF TRAIN W.R.T CAR=VELOCITY OF TRAIN-VELOCITY OF CAR

                                                      =-20j+10

magnitude is √400+100=√500=10√5 m/s

HOPE IT HELPS YOU..............

THANK YOU.