Question

Centripetal force ball on string which kind of force by our hand

Answer 1

Kinetic energy will be acted when we swing our hand

Answer 2

hey


We Considered this



Now What could be the case



Tension in the string will be

Basically no force except tension acts , 1 thing is centrifugal force is a pseudo force .

Secondly length of string is constant , so when you rotate too fast .

Faster than what mv2/r = Tcosθ(horizontal force) permits for a radii r , then horizontal force has to increase , and T in the string can only attain a max value(after which it will break),suppose it has it now, .

And it wants to compensate still for as cosθ has to increase θ will have to decrease towards 00, and it will do it when height of the ball/stone will increase w.r.t. ground and radius of the ball's circle(base) will increase , since hypotenuse(length of string) remains constant .

So height rises be causes length of string is constant and you need more centripetal force and for that cosθ has to increase and for that base has to increase for the right triangle in your image . and tension is directed away from ball along string .