Laws of Motion Questions (MCQs), NEET, JEE Main – Test 02

A roller is made by joining together two cones at their vertices O. It is kept on two rails AB and CD which are placed asymmetrically (see figure), with its axis perpendicular to CD and its centre O at the centre of line joining AB and CD (see figure). It is given a light push so that it starts rolling with its centre O moving parallel to CD in the direction shown. As it moves, the roller will tend to [JEE MAIN 2016]

A stone of mass 0.05 kg is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion? [Karnataka CET 2015]

A machine gun fires a bullet of mass 40 g with a velocity 1200 ms^–1. The man holding it can exert a maximum force of 144 N on the gun. How many bullets can he fire per second at the most? [AIEEE 2004]

A block of mass m is placed on a smooth wedge of inclination θ. The whole system is accelerated horizontally, so that the block does not slip on the wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be : [CBSE AIPMT 2004]

A horizontal force of 10 N is necessary to just hold a block stationary against a wall. The coefficient of friction between the block and the wall is 0.2. The weight of the block is [AIEEE 2003]