Question

a particle is moving in a circle such that it completes one revolution in 40 seconds. In 2 minutes and 20 seconds the ratio displacement/distance is
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Answer 1

Answer:

2 minutes 20 seconds =2×60+20=120+20=140s=40×3+20s

After 2 minutes 20 seconds the particle has completed 3 revolutions and a half revolution,therefore is at the other end of the diameter.

Displacement=2r

Distance covered =3×2πr+πr=7πr

distance

∣displacement∣

​  

=  

7πr

2r

​  

=  

7π

2

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