List of top Physics Questions on laws of motion

A man of mass \(60 \text{ kg}\) is standing in a lift moving up with a retardation of \(2.8 \text{ ms}^{-2}\). The apparent weight of the man is
FALSE statement about third law of motion is
A hanging rope can withstand a tension of 750 N. The minimum acceleration for a man of 50 kg to climb up without breaking the rope is $(g=10\text{ ms}^{-2})$
When two perpendicular forces 3 N and 4 N act on a body at rest, it is accelerated to \(2 \, ms^{-2}\). The mass of the body is.
If a gun fires 25 bullets in one second, each of $10g$ mass with a velocity of $20\,ms^{-1}$, then the recoil force on the gun in $N$ is:
Force acting on a particle varies with time \( t \) as \( F = kt \), where \( k \) is a constant. The velocity of the particle after a time \( t \) is
An object of mass m is placed in a lift moving upward with acceleration g/2. Find apparant weight.
A block of mass \(5\ \text{kg}\) is on a frictionless surface; find its acceleration when a force of \(10\ \text{N}\) is applied.
Find the coefficient of friction if the time taken by a block on the rough surface is \(50\%\) more than the time taken on a smooth surface. The distance slid by the mass is the same in both cases. The incline angle is \(45^\circ\).

Find external force F so that block can move on inclined plane with constant velocity. 

The Velocity Ratio (VR) of a block and tackle system of two pulleys with the effort in the upward direction is:
For a body to be in dynamic equilibrium, its:
The minimum force required to start pushing a body up a rough plane is \( F_1 \) while the minimum force needed to prevent it from sliding down is \( F_2 \). The plane makes an angle \( \theta \) with horizontal such that \( \tan\theta = 2\mu \). The ratio \( F_1/F_2 \) is
A force \( \vec{F}=ai+bj+ck \) is acting on a body of mass \( m \). The body was initially at rest at the origin. The coordinates of the body after time \( t \) will be
A body of mass \(2\) kg is moving with a velocity of \(10\,\text{m s}^{-1}\). If a force of \(50\) N is applied on it for \(10\) s along its motion, the velocity of the body (in \(\text{m s}^{-1}\)) is
A garden roller of weight \( 100\,kg \) is pulled with a force of \( 300\,N \) acting at an angle of \( 30^\circ \) with the ground. The effective pulling weight of the roller (in kg wt) is \((g=10\,m/s^2)\)
The force to be applied to a body of mass $200\ \text{g}$ to change its velocity by $25\ \text{m s}^{-1}$ in $5\ \text{s}$ is:
A block of mass $m$ is suspended from the ceiling of a lift by an inextensible string. When the lift moves upward with an acceleration of $0.2\ \text{m s}^{-2}$, the tension is $80\ \text{N}$. Then the mass of the block is:
If the forces acting on two bodies of masses \(2kg\) and \(3kg\) are same, then the ratio of their respective accelerations is
A stone is dropped from a height of 45 m. What is the time taken for the stone to reach the ground?
A person standing on the platform of a lift will experience weight loss, when the lift moves
A car of mass 1000 kg is moving with a velocity of 20 m/s. The driver applies the brakes, and the car comes to rest in 10 seconds. Find the average force exerted by the brakes to stop the car.
A body of mass 3 kg is kept on a rough horizontal surface. A horizontal force of 20 N acting on the body produces an acceleration of $4 ms^{-2}$ in the body. To double the acceleration of the body, the horizontal force applied is to be increased by
A block of mass $\sqrt{2}$ kg is placed on a rough horizontal surface. A force 'F' acting upwards at an angle of 45$^\circ$ with the horizontal causes the block to start motion. If the coefficient of static friction between the surface and the block is 0.25, the magnitude of the force 'F' is (Acceleration due to gravity = 10 ms$^{-2}$)
A truck of mass 8 ton is carrying a block of mass 2 ton. If a breaking force of 25 kN is applied on the truck, then the frictional force acting on the block is (Coefficient of static friction between the block and the truck is 0.3)