Question

A body covers a circular path of radius R in 20seconds. calculate the distance and displacement of the body at the end of 70 seconds.

fast plz

Answer 1

we know that circumference of a circle is = 2πR
given that
in 20 s body covers circular path
i.e.
in 20 s body covers distance 2πR
therefore in 1 s " " " (2πR)/20
so in 70 s " " " {(2πR)*70}/20

solving we get
Distance covered= 7πR


Displacement is 2R. because after 70 s body covers 7πR which is just at a distance of πR from the starting point. that means body will be exactly on the opposite side of the circle i.e. to the other end of the diameter.
Hence displacement will be 2R.

Answer 2

Answer:distance pie r and displacement 2r

Explanation:

Half rotation displacement is 2r and half rotation multiply with 2pier