Question

A car is moving along a circular track of radius r. At completion of one rotation it's displacement and the distance covered is

1) 2πr, 2πr
2) 0, 2πr
3) πr, 2πr
4) 0,0​

Answer 1

Answer:

0,2πr

Explanation:

Displacement will be zero because it returns to its original starting point.... and distance is 2πr because...the distance covered is area of the circle.... which is 2πr...

Answer 2

Answer:

(2) 0,2πr

Explanation:

Given :

• Radius of the track along which the car is moving = r

• One round is completed around the circular track

To find :

• Distance covered

• Displacement covered

Distance will at the end of 1 round will be equal to the Circumference as 1 whole round would cover whole boundary

Circumference of the circular track = 2πr

Distance = 2πr

At the end of 1 round the car would again come back to the initial position and hence the Displacement is equal to 0 metres

(2) is correct as Displacement is asked first and it is 0 and distance is 2πr