Question

A body travels along a circular path of 70m. After travelling half a revolution in 20 seconds.Find then 1) average velocity 2)average speed

Answer 1

distance of circular path =70m= Circumference
πd=70
22/7*d=70
d=70*7/22
d=35*7/11=displacement

average velocity=displacement /time
=35*7/11*1/20
=7*7/11*1/4
= 49/44
= 1.11m/s

average speed =distance/time
= 35/20
=7/4
=1.75 m/s