A small object is kept on a groove on rough incline plane of inclination `theta`. Groove makes an angle `alpha` as shown in diagram. `mu` coefficient of friction. Which of the following is correct

A small object is kept on a groove on rough incline plane of inclination theta . Groove wakes an angle alpha as shown in diagram. mu coefficient of friction. Which of the following is correct

A block is kept on an inclined plane of inclination theta of length l. the velocity of particle at the bottom of inclined is (the coefficient of friciton is mu )

A block is kept on a inclined plane of inclination q of length l. The velocity of particle at the bottom of inclined is (the coefficient of friction is mu

A block of mass m slides down a rough inclined plane of inclination theta with horizontal with zero initial velocity. The coefficient of friction between the block and the plane is mu with theta gt tan^(-1)(mu) . Rate of work done by the force of friction at time t is

An object is placed on the surface of a smooth inclined plane of inclination . It takes time t to reach the bottom of the inclined plane. If the same object is allowed to slide down rough inclined plane of same inclination , it takes time nt to reach the bottom where n is a number greater than 1. The coefficient of friction  is given by -

A block of mass m is placed on a rough inclined plane of inclination theta kept on the floor of the lift. The coefficient of friction between the block and the inclined plane is mu . With what acceleration will the block slide down the inclined plane when the lift falls freely ?