Question

A body is moving on a circular path of radius r with constant speed and completes one round of it in time t. Find distance travelled, displacement and time taken by the body when it has completed

(a) One fourth round

(b) Half round

(c) Three fourth round

(d) One round

Also represent the motion of the body by a

(a) distance-time graph

(b) displacement-time graph



Pls Help ​

Answer 1

Answer:

Correct option is

B

2r

Displacement is the shortest distance travelled from the initial point to the final point. After half revolution the displacement is the length of the diameter which is equal to 2r. Hence the displacement is 2r.