Answer to Question #77234 in Physics for Anant

Question

If a particle is travelling on a circle of 7m radius what will be it's distance and displacement when it completes three revolutions

Answer 1

Given:
R = 7 m

The path travelled by a body is called distance. Displacement is the shortest distance between initial and final points.
The distance covered in one revolution is circumference
L_1=2πR=2×3.14159×7=43.98 m
The distance covered in three revolutions is circumference
L=3L_1=131.95 m

As the body comes back to the same position after the three revolutions the displacement is 0