NEET UG Mechanics — practice questions
100 free MCQs with worked solutions. Tap any question for the answer + explanation, or practice them all in the app.
Practice NEET UG Mechanics in the app →Newton's first law of motion states that a body continues in its state of rest or of uniform motion in a straiThe tendency of a body to oppose any change in its state of rest or of uniform motion is called:A quantitative measure of inertia of a body is its:Linear momentum of a particle of mass m moving with velocity v is defined as:Newton's second law of motion gives the relation:The SI unit of force is:Impulse of a force is equal to the:Newton's third law states that to every action there is an:Action and reaction forces in Newton's third law:For a system of particles with no external force, the total linear momentum is:A bullet of mass 10 g is fired from a gun of mass 5 kg with a muzzle velocity of 400 m/s. The recoil speed of A force of 10 N acts on a body of mass 2 kg for 5 s. The change in its momentum is:The acceleration produced by a 20 N force on a 4 kg body is:A body is in equilibrium when the net force acting on it is:Frictional force between two surfaces in contact at rest, up to a certain limit, is:The maximum value of static friction is:Kinetic friction acts on a body that is:For most surfaces, coefficient of static friction μ_s and kinetic friction μ_k satisfy:The minimum angle of inclination at which a body just begins to slide is called the:For an object in uniform circular motion, the net force is directed:The magnitude of the centripetal force on a body of mass m moving with speed v in a circle of radius r is:On a level road, the maximum speed at which a car can take a circular turn of radius r without skidding is:On a banked road (angle θ, neglecting friction), the optimum speed for radius r is:A passenger inside a uniformly accelerating bus appears to be pushed backward. This apparent force is a:Tension in a string is the same throughout its length if the string is:A 5 kg block on a frictionless horizontal surface is pulled by a horizontal force of 25 N. Its acceleration isA man weighs 60 kg in an elevator. The elevator accelerates upward at 2 m/s² (g = 10 m/s²). The apparent weighA man of mass 60 kg in a freely falling lift experiences an apparent weight of:Two bodies of unequal masses are dropped together from the top of a tower in vacuum. They reach the ground:Newton's second law in vector form is most generally written as:The work done by a constant force F displacing a body by s with angle θ between them is:Work done by a force perpendicular to the displacement is:The work-energy theorem states that the net work done on a particle equals the:The kinetic energy of a body of mass m moving with speed v is:If the momentum of a body is doubled, its kinetic energy becomes:For a conservative force, the work done in a closed path is:For a conservative force F(x), the relation to potential energy U(x) is:The potential energy stored in a spring of stiffness k stretched by x is:A spring is stretched by 0.1 m; its stiffness is 200 N/m. The energy stored is:In an elastic collision between two bodies:In a perfectly inelastic collision, the bodies after collision:The coefficient of restitution e for a perfectly elastic 1-D collision is:A body of mass 2 kg moving at 3 m/s collides head-on and elastically with a stationary body of equal mass. AftPower is defined as the:The SI unit of power is:Instantaneous power of a force F acting on a particle moving with velocity v is:1 kWh in joules is:A pump lifts 100 kg of water through 10 m in 5 s (g = 10 m/s²). The power developed is:The energy possessed by a body by virtue of its configuration is called:Gravitational potential energy near Earth's surface for height h is:For a freely falling body, as it descends, what remains constant (no air drag)?A bullet of mass 10 g and speed 200 m/s embeds itself in a stationary wooden block of mass 990 g on a smooth sIn the previous collision, the fraction of initial kinetic energy lost is approximately:The work done by gravity on a 2 kg body falling 5 m freely (g = 10 m/s²) is:The kinetic energy of an electron of mass 9.1 × 10⁻³¹ kg moving at 1 × 10⁶ m/s is approximately:A constant force does work W on a body that starts from rest. If the same force acts for twice the displacemenFor a particle moving along a straight line under a varying force F(x), the work done from x = a to x = b is:A heavy body and a light body have the same kinetic energy. The body with the greater momentum is:The average power for a process is computed as:The dimensional formula of power is:Newton's law of universal gravitation states that the force between two point masses is:The SI unit of the universal gravitational constant G is:The approximate value of G is:The acceleration due to gravity g at the Earth's surface (radius R, mass M_E) is:Variation of g with height h above the Earth's surface (for h ≪ R) is approximately:At a depth d below the Earth's surface (assuming uniform density), g varies as:The value of g at the centre of a uniform spherical Earth is:Kepler's first law (orbits) states that planetary orbits are:Kepler's second law states that the line joining a planet to the Sun sweeps out:Kepler's third law gives the relation T² ∝ ___, where T is the orbital period and a the semi-major axis:The gravitational potential energy of a two-particle system separated by r (taking U → 0 as r → ∞) is:The orbital speed of a satellite in a circular orbit of radius r around a planet of mass M is:The escape speed from the surface of a planet of mass M and radius R is:The escape speed at the Earth's surface is approximately:The orbital speed of a satellite in a low Earth orbit (just above the surface) is approximately:For a satellite, escape speed v_e and orbital speed v_o (at the same height) are related by:A geostationary satellite orbits the Earth with a period of approximately:A geostationary satellite stays above the:For a satellite in a circular orbit, total mechanical energy E and kinetic energy K are related by:The gravitational field inside a uniform spherical shell of mass is:For points outside a spherically symmetric body, gravitational attraction is as if all mass were concentrated The gravitational potential V at a point at distance r from a point mass M is:At a great distance from the Earth, the gravitational potential approaches:The path of a projectile launched from Earth with a speed equal to escape velocity (radially, ignoring air draIf the radius of a planet doubles while its mass stays the same, g at its surface becomes:Two satellites orbit a planet at radii r and 4r in circular orbits. The ratio of their periods T1 : T2 is:For a satellite in a circular orbit, the centripetal acceleration is provided by:For a particle dropped from rest from a height much greater than R toward Earth (ignore air), the speed at impFor a satellite of mass m in a circular orbit of radius r around a planet of mass M, the total mechanical enerThere is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is piercA uniform rod of density $\rho$ is placed in a wide tank containing a liquid of density $\rho_0(\rho_0 > \rho)Calculate the force $F$ that is applied horizontal at the axle of the wheel which is necessary to raise the whA thin uniform circular disc of mass $M$ and radius $R$ is rotating in a horizontal plane about an axis passinTwo particles of masses $m_1$ and $m_2$ in projectile motion have velocities $\vec{u}_1$ and $\vec{u}_1$ respeA particle which is constrained to move along the $x$-axis, is subjected to a force in the same direction whicThe potential energy between two atoms in a molecule is given by $U(x) = \frac{a}{x^{1/2}} - \frac{b}{x^6}$; wA block $P$ of mass $m$ is placed on a frictionless horizontal surface. Another block $Q$ of same mass is keptA stone projected with a velocity $u$ at an angle $\theta$ with the horizontal reaches maximum height $H_{1}$.A ball is thrown vertically upwards. Which of the following graph/graphs represent velocity-time graph of the A ball is projected upwards from a height $h$ above the surface of the earth with velocity $v$. The time at wh