Question

A player completes a circular of radius r in 40 sec. At the end of 3 min . displacement will be​

Answer 1

Explanation:

v = 2πr/40

total time = 3×60s

= 180s

distance = 2πr/40 ×180

= 9 πr

which is 4.5 revolutions

so after 3 minutes

player will be at a point exactly opposite to its initial point.

displacement becomes = 2r

Answer 2

Answer:

2r

Explanation:

Given :

• Radius of the circular track = r
• Time taken to complete a round = 40 seconds
• Total time for completing rounds = 3 minutes = 180 seconds

To find :

• Displacement at the end of 180 seconds

No. Of rounds = total time/time taken to complete one round

No. Of rounds = 180/40

No.of rounds = 4.5 rounds

At the end of 4.5 rounds the player would come diametrically opposite to the point of initial start

So Displacement = diameter

Displacement = 2×r

The Displacement = 2r