List of top Physics Questions on laws of motion asked in AP EAPCET

A body is placed at the top of an inclined plane of angle of inclination \( \tan^{-1}\left(\frac{9}{16}\right) \). If the plane is smooth, the body reaches the bottom in time \(T\) and if the plane is rough, it takes time \(3T\) to reach the bottom of the plane, then the coefficient of kinetic friction between the body and the rough inclined plane is:
A block of mass 5 kg is sliding with constant velocity of \( 6 \, ms^{-1} \) on a frictionless horizontal surface. The force exerted on the horizontal surface is:
On a wedge of mass 2m, a block of mass m is sliding as shown in the figure. There is no friction between block and wedge. Then the minimum coefficient of friction between wedge and ground so that the wedge does not move is:
A block is kept at the top of a rough inclined plane of length $2.8\text{ m}$ and angle of inclination $\cos^{-1}(0.6)$. If the coefficient of kinetic friction between the block and the upper half of the plane is $0.3$ and between the block and the lower half of the plane is $0.5$, then the velocity with which the block reaches the bottom of the plane is (acceleration due to gravity $=10\text{ ms}^{-2}$)
A lift of mass $M$ is accelerating upwards with an acceleration $a$. If the tension in the supporting cable is $T_1$ during upward acceleration and $T_2$ when it accelerates downwards with the same acceleration $a$, then the ratio $T_1 / T_2$ is:
A lift of mass $M$ is accelerating upwards with an acceleration $a$. If the tension in the supporting cable is $T_1$ during upward acceleration and $T_2$ when it accelerates downwards with the same acceleration $a$, then the ratio $T_1 / T_2$ is:
A boat of mass \(700\,\text{kg}\) is travelling at a speed of \(24\,\text{ms}^{-1}\) when its engine is shut off. The magnitude of frictional force \(f\) between boat and water is given as \(f=35v\), where \(v\) is the speed in \(\text{ms}^{-1}\) and \(f\) is in newton. The speed of boat becomes \(6\,\text{ms}^{-1}\) in time
A hot air balloon is descending with a constant acceleration of \(2 \, \text{m/s}^2\). The mass of the balloon and its contents is 600 kg. Assuming the volume of the balloon is kept constant so that the buoyant force remains the same, the mass of the balloon should be changed so that it starts ascending with the same acceleration. (Take \(g = 10 \, \text{m/s}^2\)).
Three bodies A, B and C of masses 10 g each are tied to a thread–pulley system as shown in the figure. Assume the masses of pulley and threads are negligible and there is no friction in the pulley. The coefficient of friction between A and B with the horizontal surface is 0.1. Find the acceleration with which body C comes down. (Take \(g = 10\, m\,s^{-2}\))

Assertion [A]: A boy feels more pain when he falls down on a hard concrete floor than when he falls on the sand floor
Reason [R]: Every action has equal and opposite reaction. The time of impact of cement floor is smaller compared to that of sand floor
Three forces of magnitudes \(F_1\), \(F_2\) and \(F_3\) act on a body located at the origin as shown in the figure. The condition that gives zero net force is