Question

a car travels from stop A to stop B with a speed of 30km/h and then returns back to A with speed of 50km/h.Find displacement of the car, distance travelled by car, average speed of the car.

Answer 1

Displacement

The displacement of the car is zero as it comes back to its original position.

Ans: 0m/s

Distance

Total distance travelled by the car cannot be determined by the given information..

Only displacement and speed is given.

If time was given we could have calculated by:

Speed=Distance/Time

Average speed

Average speed =$\frac{50km/hr+30km/hr}{2}$

$\impies\frac{80km/hr}{2}$

$\implies40km/hr$

Ans:40km/h

Hope it helps