NEET Physics MCQs

Starting from rest, a body slides down a 45° inclined plane in twice the time it takes to slide down the same distance in the absence of friction. The coefficient of friction between the body and the inclined plane is

A smooth inclined plane of length L having inclination $heta$ with the horizontal is inside a lift which is moving down with retardation a. The time taken by $\alpha$ body to slide down the inclined plane, from rest, will be

A body of 5 kg weight kept on a rough inclined plane of angle ${30^0}$ starts sliding with a constant velocity. Then the coefficient of friction is (assume $g = 10\;m/{s^2}$)

Two iron blocks of equal mass but with double area slide down an inclined plane with friction coefficient $\mu$. If the first block with surface area A experience a frictional force f, then the second block with surface area 2A will experience a frictional force

A coin of mass 10 g is placed over a book of length 50 cm. The coin is on the verge of sliding when one end of the book is lifted 10 cm up. The coefficient of static friction between the book and the coin is

A point mass m is moving along inclined plane with acceleration a with respect to smooth triangular block. The triangular block is moving horizontally with acceleration ${a_0}$. The value of a is

A body of mass 10 kg is lying on a rough plane inclined at an angle of ${30^0}$ to the horizontal and the coefficient of friction is 0.5. the minimum force required to pull the body up the plane is

If a block slides down a plane inclined at 30° with horizontal, then the coefficient of friction between the block and inclined plane is

A box is placed on an inclined plane and has to be pushed down. The angle of inclination is

A block is moving up an inclined plane of inclination ${60^0}$ with velocity of 20 ${\rm{m}}{{\rm{s}}^{ - 1}}$ and stops after 2.00 s. If ${\rm{g}} = 10{\rm{m}}{{\rm{s}}^{ - 2}}$ then the approximate value of coefficient of friction is