Question

A train is moving with a velocity 120km/h then howuch distance it will cover in 30 minutes

Answer 1

velocity= 120km/hr

time=30 min=30/60=1/2 hr  (since   1 min = 1/60 hr)

so, velocity= displacement/time

                displacement = velocity*time

                                      =120km/hr *1/2 hr

                                      =60 km

displacement is a vector quantity since it has direction

distance is a scalar quantity and is not dependent upon direction.

generally speed= distance/time(speed is scalar quantity)