List of top Physics Questions on Kinetic Energy asked in JEE Main

Earth has mass 8 times and radius 2 times that of a planet. If the escape velocity from the earth is 11.2 km/s, the escape velocity in km/s from the planet will be:

The velocity-time graph of an object moving along a straight line is shown in the figure. What is the distance covered by the object between $ t = 0 $ to $ t = 4s $?

The ratio of vapour densities of two gases at the same temperature is $ \frac{4}{25} $, then the ratio of r.m.s. velocities will be:

The kinetic energy of translation of the molecules in 50 g of CO$_2$ gas at 17°C is:

A bob of mass $m$ is suspended at a point $O$ by a light string of length $l$ and left to perform vertical motion (circular) as shown in the figure. Initially, by applying horizontal velocity $v_0$ at the point ‘A’, the string becomes slack when the bob reaches at the point ‘D’. The ratio of the kinetic energy of the bob at the points B and C is:

A satellite of mass 1000 kg is launched to revolve around the earth in an orbit at a height of 270 km from the earth's surface. Kinetic energy of the satellite in this orbit is ______ x $10^{10}$ J.
(Mass of earth = $6 \times 10^{24}$ kg, Radius of earth = $6.4 \times 10^6$ m, Gravitational constant = $6.67 \times 10^{-11}$ Nm$^2$ kg$^{-2}$)

A ball of mass 100 g is projected with velocity 20 m/s at $ 60^\circ $ with horizontal. The decrease in kinetic energy of the ball during the motion from point of projection to highest point is:

A concave mirror produces an image of an object such that the distance between the object and image is 20 cm. If the magnification of the image is $ -3 $, then the magnitude of the radius of curvature of the mirror is:

In a long glass tube, a mixture of two liquids A and B with refractive indices 1.3 and 1.4 respectively, forms a convex refractive meniscus towards A. If an object placed at 13 cm from the vertex of the meniscus in A forms an image with a magnification of $-2$, then the radius of curvature of the meniscus is:

A stationary particle breaks into two parts of masses $m_A$ and $m_B$, which move with velocities $v_A$ and $v_B$, respectively. The ratio of their kinetic energies ($K_B : K_A$) is:

An artillery of mass $M_1$, fires a shell of mass $M_2$. At the time of firing the ratio of kinetic energy is.

A uniform disc of mass $5$ $kg$ and radius $2$ $m$ is rotating with $10$ $rad/s$. Now another identical disc is gently placed on first disc. Because of friction both disc acquire common angular velocity. Loss of kinetic energy in process is ________J.

Four particles A, B, C, D of mass $\frac{m}{2}$, $m$, $2m$, $4m$ have the same momentum, respectively. The particle with maximum kinetic energy is:

When kinetic energy of a body becomes 36 times of its original value, the percentage increase in the momentum of the body will be

Two bodies of mass 4 g and 25 g are moving with equal kinetic energies. The ratio of the magnitude of their linear momentum is:

The total kinetic energy of 1 mole of oxygen at 27°C is :
[Use universal gas constant (R)= 8.31 J/mole K]

The kinetic energy of a particle is 10000 joule with the mass 2kg. Find the momentum for the particle?

A body of mass $10 kg$ is moving with an initial speed of $20 m / s$ The body stops after $5 s$ due to friction between body and the floor The value of the coefficient of friction is: (Take acceleration due to gravity $g =10 ms ^{-2}$ )

The following statements are given :
(1) The average kinetic energy of a gas molecule decreases when the temperature is reduced
(2) The average kinetic energy of a gas molecule increases with increase in pressure at constant temperature
(3) The average kinetic energy of a gas molecule decreases with increases in volume
(4) Pressure of a gas increases with increase in temperature at constant pressure
(5) The volume of gas decreases with increase in temperature
Choose the correct answer from the options given below :

A stone is projected at an angle of $30\degree$ to the horizontal. The ratio of kinetic energy at projection to its kinetic energy at the highest point is:

A solid sphere of mass 2 kg is making pure rolling on a horizontal surface with kinetic energy 2240 J. The velocity of centre of mass of the sphere will be ____ ms^–1.

A car accelerates from rest to $ u \, \text{m/s} $. The energy spent in this process is $ E \, \text{J} $. The energy required to accelerate the car from $ u \, \text{m/s} $ to $ 2u \, \text{m/s} $ is $ nE \, \text{J} $. The value of $ n $ is.

Given below are two statements:
Statement I: A truck and a car moving with same kinetic energy are brought to rest by applying brakes which provide equal retarding forces. Both come to rest in equal distance.
Statement II : A car moving towards east takes a turn and moves towards north, the speed remains unchanged. The acceleration of the car is zero.
In the light of given statements, choose the most appropriate answer from the options given below.

A body is dropped on ground from a height ‘h₁’ and after hitting the ground, it rebounds to a height ‘h₂’ If the ratio of velocities of the body just before and after hitting ground is $4$. then percentage loss in kinetic energy of the body is$\frac{x}{4}$. The value of x is_____.