Question

If a body complete one round on a circular path of radius 7 metre in 40 seconds and find the distance and displacement 180 second?

Answer 1

distance in 1 rev. =2×pie×r

=2×22/7×7

=2×22

=44 m

no.of revolution in 180 sec=180/40

=4.5 rev.

distance covered in 4.5 rev.= 44×4.5

=198 m

displacement =diameter of circle

=2r

=2×7

=14 m