Question

Displacement of a body which moves (3/4th)round of a circular path of radius is _______.​

Answer 1

Answer:

√2r

Explanation:

Given that,

A body moves ¾th round of a circular path of radius r.

To find the displacement.

We know that, displacement is the Length of path between initial and final position.

Clearly, the body has covered circular path in clockwise direction from A to B.

Now, the distance between Initial and final position is AB.

We have to find rhe length of AB.

Now, ∆AOB is right angled triangle.

Also, we have,

OA = oB = r

So, by pythagoras theorem,

AB = √2r

Hence, Displacement = √2r.

Answer 2

Answer: r√2

Explanation: