Question

if a partical is moving in a circular path of radius (r). what is the displacement​

Answer 1

Answer:

Explanation:

Displacement at half path is the shortest distance between the initial and final point.

So, it's equal to twice the radius of the circle =2r

Answer 2

Answer:

Displacement = 2r.

Hope this helps you out!

Explanation:

Let us first see the definition of distance and displacement.

Distance:

It is defined as the total distance travelled by the particle. It does not depend on the initial or final position. It just depends on the length of the path travelled. It is a scalar quantity.

Displacement:

It is defined as the change in the position of the particle as it moves from one position to another.

Mathematically, we can write:

△r=rf−ri  , where,

△r is the displacement and rf and ri are the initial and final position of the particle.

We can also say that displacement is the shortest distance between final and initial point. It is a vector quantity.

Now, coming to question, we have a particle which has travelled half the circle and we have to find the displacement.

Initial position of the particle is B and the final position of the particle is A.

Therefore, the shortest distance between A and B is 2r.

Hence, displacement = 2r.