Question

a body travels along a circular path of radius 70m. after travelling half a revolution 20s, find average velocity and speed

Answer 1

Answer:

speed=velocity=distance/time

Explanation:

velocity=70/20

=3.5 m/s

Answer 2

Answer:

average speed = 11 m/s

average velocity= 7m/s

Explanation:

Given:

~ radius of circular path = 70m

~ it completes half revolution in time, t = 20 s

SOLUTION:

Average speed = total distance traveled/ total time taken

in our case;

Average speed = half the circumference of circle / time taken

= (π * 70)/ 20

=220/20

= 11 m/s

Average velocity = displacement/ time taken

in our case;

Average velocity= 2*r/t

= (2*70)/20

= 7 m/s