Q.
A frictionless track $ABCDE$ ends in a circular loop of radius $R,$ figure. A body slides down the track from point $A$ which is at a height $h = 5\ $cm. Maximum value of $R$ for the body to successfully complete the loop is
A) 5 cm
B) 15/4 cm
C) 10/3 cm
D) 2 cm
Explanation
(d) For successfully completing the loop,
$h = \frac{5}{4}R \Rightarrow R = \frac{2h}{5} = \frac{2 \times 5}{5} = 2cm$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.