Question

A player completes a circular path of radius R in 40 sec. Its displacement at the end of 2 min 20 sec will be?

Answer 1

given:
radius=R
T=40 sec

t=2 min 20 sec
=(60(2)+20)sec
=140 sec

no.of rounds=140 sec÷40 sec
=14÷4
=3.5

but displacement is only 0.5 circle,as for every complete round,displacement is 0.

circumference÷2
=displacement
=2r
=2R

hope that helps!☺

Answer 2

Answer:

displacement will be 2r because a player completes a circular track in 40s

in 140s he complete 3.5 rounds

So, he's displacement will be 2r.

I hope it will help u