Question

An athlete completes half round of a circular track of radius R, then the displacement covered by the athlete is n R. What is the value of n ?​

Answer 1

Answer:

• Radius of the circle = R

according to the question .

the athlete cover half of the circular track

☆ therefore ,  

Distance = half of the circumference of the circle

• Circumference of the circle =

hence, distance = pi × R

Displacement = diameter of the circle

• Diameter = 2 R

hence ,  Displacement = 2 R

Answer 2

Answer:

displacement is the shortest distance . here the distance is πr therefore the displacement is just the diameter of circle i.e 2r