Question

A stone is tied to a rope is rotated in a vertical
circle with uniform speed. If the diffeence
between maximum and minimun tensions in
the rope is 20N, mass of the stone in Kg is
(g = 10m/s2
1) 0.75 2) 1.0 3) 1.5
4) 0.5​

Answer 1

Answer:

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Answer 2

Answer:

Explanation:

Let the mass of the stone be m, and the angular speed with which it rotates be ω.

Thus at the bottom most point,  

Tb  −mg=mω^2 l

And at the top most point,

Tt +mg=mω^2l

⟹Tb−Tt  =2mg=20

⟹mg=10

⟹m=1 kg