Question

A car travels from stop A to stop B with a speed of 30 km per hour and when returns back to A with a speed of 50 km per hour find.
(i) Displacement of the car
(ii) Distance travelled by the car
(iii) Average speed of the car

Answer 1

Dear Student,
a) zero
b) 2d
c) average speed=$\frac{2d}{{\displaystyle \frac{d}{30}+\frac{d}{50}}}=37.5m/s$