Question

A particle moves three quarters of a circle of radius r. What is the magnitude of displacement?

Answer 1

Answer:

Explanation:

Hello friend the answer will be

Distance =2pir/3

Considering the circle of large radius we can say that arc length in this case becomes equal to chord length i.e displacement so this is the answer

Or else u can use the formula

Angle =arc/radius and angle in this case is 90 degree

Arc =2 pi r/3

Answer 2

Explanation:

angle=arc/radius and angle which is 90degree

arc=2πr/3