Q. A body of mass 5 kg is whirled in a vertical circle by a string 1 m long. Calculate velocity at the top of the circle for just looping the vertical loop
A) 3.1 $ms^{- 1}$
B) 7 $ms^{- 1}$
C) 9 $ms^{- 1}$
D) 7.3 $ms^{- 1}$
Explanation
(a) $v_{H} = \sqrt{rg} = \sqrt{1 \times 9.8} = 3.1\ ms^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.