Question

A particle is performing vertical circular motion. The difference in tension at lowest and highest point is ______.

Options

• 8 mg

• 2 mg

• 6 mg

• 4 mg

Answer 1

A particle is performing vertical circular motion. The difference in tension at lowest and highest point is 6 mg.

Explanation:

`"T"_1="mv"_1^2/r-"mg"`

`"T"_2="mv"_2^2/r+"mg"`

`therefore"T"_2-"T"_1=("V"_2^2-"V"_1^2)+2"mg"` = 4mg + 2mg = 6mg