A sphere a disk and a hoop made of homogeneous materials have the same radius (10 cm)
Channel: Doubtnut
Date: 12/07/2020

A sphere a disk and a hoop made of homogeneous materials have the same radius (10 cm) and mass (3kg) They are released from rest at the top of a `30^(@)` incline and roll down without slipping through a vertical distance of 2m. `(g=9.8m//s^(2))`  (a). What are their speeds at the bottom?  (b). findt the friction force `f` each case  (c). if they start together at `t=0`, at what time does each reach the bottom?