Question

35. If a stone is tied to the string then the force which supports the stone against gravity
by pulling it upward is known as
(a) field force (b) contact force (c) tension
(d) all​

Answer 1

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

I hope this helps you

Answer 2

Answer:

If a stone is tied to the string then the force which supports the stone against gravity  by pulling it upward is known as

c) tension