A sphere cannot roll on

Two uniform solid spheres having unequal masses and unequal radii are released from rest from the same height on a rough incline. If the spheres roll without slipping,

A hollow sphere and a solid sphere having same mass and same radii are rolled down a rough inclined plane.

In rear-wheel drive cars, the engine rotates the rear wheels and the front wheels rotate only because the car moves. If such a car accelerates on a horizontal road, the friction

A sphere can roll on a surface inclined at an angle θ if the friction coefficient is more than Suppose the friction coefficient is If a sphere is released from rest on the incline,