Question

A small stone tied to an inextensible string of negligible mass is rotated in a circle of radius $2m$ in a vertical plane. Find the speed at a horizontal point on the circle. (in $m/s$)

• A. $7.67$
• B. $2.36$
• C. $6.32$
• D. $8.32$

Answer 1

The correct option is A $7.67$

$v=\sqrt{3gr}$

$v=\sqrt{3\ast 9.8\ast 2}=7.67m/s$