Question

A 50g stone tied to a 60cm long string is rotated in a circle. How much work is done? Why?​

Answer 1

Answer:

Correct option is A)

Radius = r = 50cm = 0.5m

In 20 sec revolution = 10

In 1 sec revolution = 10/20 = 1/2 Hz

N = 1/2HZ

Now,

Angular velocity = W = 2лn = w = 2 x 3.14 x 0.5

Radial Acceleration = w²r

Radial Acceleration = (3.14)² × 0.5m/s² =

X

4.93m/s² = 493cm/s²

hope you help this ☺