Question

Tying a stone to one end of a string and swinging it round and round by the other end of the string.

Answer 1

Answer:

When the stone is at the bottom position forces acting on stone are:

Upward force tension (T), Downward forces are weight (mg) and also  

R

mv  

2

 

​  

 centrifugal force  

So balancing forces we get :

T=mg+  

R

mv  

2

 

​  

 

And minimum tension is obtained at highest point which will be:

T=mg−  

R

mv  

2

 

​  

Answer 2

Answer:

same as the above answer