AIPMT-PRELIMS Physics Laws of Motion Class 11 Questions

A person of mass 60 kg enters a lift of mass 940 kg and presses the button one control panel. The lift starts moving upwards with an acceleration 1.0 m/s². If g = 10 m/s², the tension in the supporting cable is

A body of mass M hits normally a rigid wall with velocity V and bounces back with the same velocity. The impulse experienced by the body is

A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is μ. The acceleration α of the cart that will prevent the block from falling satisfies

A man of 50 kg mass is standing in a gravity free space at a height of 10 m above the floor. He throws a stone of 0.5 kg mass downwards with a speed 2 m/s. When the stone reaches the floor, the distance of the man above the floor will be

A body, under the action of a force \( \vec{F} = 6 \hat{i} - 8 \hat{j} + 10 \hat{k} \), acquires an acceleration of 1 m/s². The mass of this body must be:

The mass of a lift is 2000 kg. When the tension in the supporting cable is 28000 N, then its acceleration is:

An explosion blows a rock into three parts. Two parts go off at right angles to each other. These two are, 1 kg first part moving with a velocity of 12 ms⁻¹ and 2 kg second part moving with a velocity of 8 ms⁻¹. If the third part flies off with a velocity of 4 ms⁻¹, its mass would be:

A particle of mass m is projected with velocity v making an angle of 45° with the horizontal from level ground. When the particle lands on the level ground the magnitude of the change in its momentum will be -

Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be -

A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle of 30° with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 s, the average force acting on the wall is:

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 :-

The coefficient of static friction, μₛ, between block A of mass 2 kg and the table as shown in the figure is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and massless. (g = 10 m/s²)

A monkey of mass 20 kg is holding a vertical rope. The rope will not break when a mass of 25 kg is suspended from it but will break if the mass exceeds 25 kg. What is the maximum acceleration with which the monkey can climb up along the rope ? (g = 10 m/s²)

A man weighs 80 kg He stands on a weighing scale in a lift which is moving upwards with a uniform acceleration of 5m/s². What would be the reading on the scale ? (g = 10 m/s²)

An object of mass 3kg is at rest. Now a force of F⃗ = 6t²î + 4tĵ is applied on the object then velocity of object at t = 3 second is :-

A block of mass 10 kg placed on rough horizontal surface having coefficient of friction μ = 0.5, if a horizontal force of 100 N acting on it then acceleration of the block will be :-

A lift of mass 1000 Kg which is moving with acceleration of 1 m/s² in upward direction, then the tension developed in string which is connected to lift is :-

A cricketer catches a ball of mass 150 gm. in 0.1 second moving with speed 20 ms⁻¹. Then he experiences force of : -

On the horizontal surface of a truck a block of mass 1 kg is placed (μ = 0.6) and truck is moving with acceleration 5 m/s² then the frictional force on block will be :-

A 1 kg stationary bomb is exploded in three parts having mass 1 : 1 : 3 respectively. Parts having same mass move in perpendicular direction with velocity 30 ms⁻¹, then the velocity of bigger part will be:

Two masses as shown are suspended from a massless pulley. Calculate the acceleration of the system when masses are left free:

A body of mass 3 kg hits a wall at an angle of 60° & returns at the same angle. The impact time was 0.2 s. Calculate the force exerted on the wall:

A mass of 1 kg is thrown up with a velocity of 100 m/s. After 5 seconds, it explodes into two parts. One part of mass 400 g comes down with a velocity 25 m/s. Calculate the velocity of other part:

A man is slipping on a frictionless inclined plane & a bag falls down from the same height. Then the speed of both is related as: