Question

A ball of mass 1 kg is being revolved in vertical circle fasten at one end of the string of 5 metre length.

Find:

(i) The tension in the string will be zero for which speed of ball at the highest point of the circle ? (g=9.8 m/sec^2)

(ii) What should be the speed of the ball at the lowest point in this situation?​

Answer 1

Answer:

3rev/sec⟹3×2π rad/sec

or ω=6π radian/sec

v=rω=0.1×6π

=1.88m/s

T=mω  

2

r=1×36×π  

2

×0.1

=35.5N

a  

t

​

=αr

and a=0

∴a  

t

​

=0  a  

c

​

=ω  

2

r

=36×π  

2

×0.1

a  

c

​