Four solid spheres are made to move on a rough horizontal surface. Sphere `P` is given a spin and
Channel: Doubtnut
Date: 2020-01-19

Four solid spheres are made to move on a rough horizontal surface. Sphere `P` is given a spin and released. Sphere `Q` is given a forward linear velocity. Spheres `R` and `S` are given linear and rotational motions as shown in the figure. Directions of the friction force on spheres `P,Q,R,S` are respectively. .