Question

a body covers a circle of radius 14 m in 20 seconds calculate displacement after 50 seconds

Answer 1

Explanation:

10 is the correct answer

Answer 2

Answer:we know that circumference of a circle is = 2πR

given that

in 20 s body covers circular path

i.e.

in 20 s body covers distance 2πR

therefore in 1 s " " " (2πR)/20

so in 70 s " " " {(2πR)*70}/20

solving we get

Distance covered= 7πR

Displacement is 2R. because after 70 s body covers 7πR which is just at a distance of πR from the starting point. that means body will be exactly on the opposite side of the circle i.e. to the other end of the diameter.

Hence displacement will be 2R.