Question

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

Answer 1

Answer:

493cm/s

Explanation:

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=2πn=w=2×3.14×0.5

Radial Acceleration =w

2

r

Radial Acceleration =(3.14)

2

×0.5m/s

2

=4.93m/s

2

=493cm/s

2