NEET UG Physics — Mechanics previous year questions with solutions.
One coolie takes 1 minute to raise a suitcase through a height of $2 \mathrm{~m}$ but the second coolie takes $30 \mathrm{~s}$ to raise the same suitcase to the same height. The power two coolies are in the ratio
An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass $1 \mathrm{~kg}$ moves with a speed of $12 \mathrm{~ms}^{-1}$ and the second part of mass $2 \mathrm{~kg}$ moves with $8 \mathrm{~ms}^{-1}$ speed. If the third part flies off with $4 \mathrm{~ms}^{-1}$ speed, then its mass is
The radius of planet is twice the radius of earth. Both have almost equal averge mass densities $V_P$ and $V_E$ are escape velocities of the planet and the earth respectively, then:
A uniform force of $(3 \mathbf{i}+\mathbf{j}) \mathrm{N}$ acts on a particle of mass $2 \mathrm{~kg}$. Hence the particle is displaced from position $(2 \mathbf{i}+\mathbf{k}) \mathrm{m}$ to position $(4 \mathbf{i}+3 \mathbf{j}-\mathbf{k}) \mathrm{m}$. The work done by the force on the particle is
A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?
Three blocks with masses $m, 2 m$ and $3 m$ are connected by strings, as shown in the figure. After an upward force $F$ is applied on block $m$, the masses move upward at constant speed $v$. What is the net force on the block of mass $2 m ?$ 
A car is moving in a circular horizontal track of radius $10 \mathrm{~m}$ the roof of the car by a light wire of length $1.0 \mathrm{~m}$. The angle made by the wire with the vertical is: 
The displacement ' $x$ ' (in meter) of a particle of mass ' $m$ ' (in kg) moving in one dimension under the action of a force, is related to time ' $t$ ' (in sec) by $t=\sqrt{x}+3$. The displacement of the particle when its velocity is zero will be:
The velocity of a projectile at the initial point $A$ is $(2 \mathbf{i}+3 \mathbf{j}) \mathrm{m} / \mathrm{s}$. Its velocity (in $\mathrm{m} / \mathrm{s}$ ) at point $B$ is 
The ratio of radii of gyration of a circular ring and a circular disc, of the same mass and radius about an axis passing through their centres and perpendicular to their planes are:
The discs are rotating about their axes, normal to the discs and passing through the centres of the discs. Disc $D_1$ has $2 \mathrm{~kg}$ mass and $0.2 \mathrm{~m}$ radius and initial angular velocity of $50 \mathrm{rad} \mathrm{s}^{-1}$. Disc $\mathrm{D}_2$ has $4 \mathrm{~kg}$ mass, $0.1 \mathrm{~m}$ radius and initial angular velocity of $200 \mathrm{rad} \mathrm{s}^{-1}$. The two discs are brought in contact face to face, with their axes of rotation coincident. The final angular velocity (in rad $s^{-1}$ ) of the system is:
The wettability of a surface by a liquid depends primarily on
A body of mass $m$ taken from the earth's surface to the height equal to twice the radius $(R)$ of the earth. The change is potential energy of body will be
Vectors $\vec{A}, \vec{B}$, and $\vec{C}$ are such $\vec{A} \cdot \vec{B}=0$ $\vec{A} \cdot \vec{C}=0$. Then the vector parallel is $\vec{A}$ is:
A small object of uniform density rolls up a curved surface with an initial velocity $v^{\prime}$. It reaches up to a maximum height of $\frac{3 v^2}{4 g}$ with respect to the initial position. The object is
Infinite number of bodies, each of mass $2 \mathrm{~kg}$ are situated on $x$-axis at distance $1 \mathrm{~m}, 2 \mathrm{~m}, 4 \mathrm{~m}, 8 \mathrm{~m}$, respectively from the origin. The resulting gravitational potential due to this system at the origin will be
The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?
The pair of quantities having same dimensions is:
A stone falls freely under gravity. It covers distances $h_1, h_2$ and $h_3$ in the first 5 seconds, the next 5 seconds and the next 5 seconds respectively. The relation between $h_1, h_2$ and $h_3$ is
A particle of mass ' $m$ ' is kept at rest at a height $3 R$ from the surface of earth, where ' $R$ ' is radius of earth and ' $M$ ' is mass of earth. The minimum speed with which is should be projected, so that it does not return back, is $(g$ is acceleration due to gravity on the surface of earth)
A solid cylinder of mass $3 \mathrm{~kg}$ is rolling on a horizontal surface with velocity $4 \mathrm{~ms}^{-1}$. It collides with a horizontal spring of force constant $200 \mathrm{Nm}^{-1}$. The maximum compression produced in the spring will be
The potential energy of a particle in a force field is $U=\frac{A}{r^2}-\frac{B}{r}$, where $A$ and $B$ are positive constants and $r$ is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is
A circular platform is mounted on a frictionless vertical axle. Its radius $R=2 \mathrm{~m}$ and its moment of inertia about the axle is $200 \mathrm{~kg} \mathrm{~m}^2$. It is initially at rest. A $50 \mathrm{~kg}$ man stands on the edge of the platform and begins to walk along the edge at the speed of $1 \mathrm{~ms}^{-1}$ relative to the ground. Time taken by the man to complete one revolution is
The dimensions of $\left(\mu_0 \varepsilon_0\right)^{-1 / 2}$ are