Question

A car is moving in a circular track of radius r(cm). The displacement of
the car after the completion of 1.5 round is
A. 3nr
B. nr
C. 2nr
D. 21
velocity 20 m/s​

Answer 1

Answer:

According to your question, the body moves from point A to point B thereby completing half a revolution. Since distance is the length of path covered therefore it will be equal to half the circumference i.e. 1/2 × 2pi r or pi × r. And the displacement is equal to the distance between initial and final point.

Therefore it will be equal to the diameter or r+r=2r.