Kinetic Energy

An object which weight is $1.2 \mathrm{kg}$. If throw upward with velocity of $15 \mathrm{m}/\mathrm{s}$. Calculate the initial kinetic energy and the maximum height reached by the object. $\left(g=9.8 \mathrm{m}/{\sec }^2\right)$.

Two bodies of the same mass have velocities in the ratio 2:3. The ratio of their kinetic energies will be

Define kinetic energy. Derive an expression for kinetic energy of a body of mass m moving with a velocity v.

If an object of mass $10 \mathrm{kg}$ is moving with a uniform speed of $10 \mathrm{m}/\mathrm{s}$, then the linear momentum and the kinetic energy of the object, respectively, are

What happens to the molecules when the ice starts to melt$?$

What is kinetic energy?

Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?

How fast should a man weighing $600 \mathrm{N}$ run to achieve a kinetic energy of $750 \mathrm{J}$. Take $g=10 \mathrm{m} {\mathrm{s}}^{-2}$.

Which of the following graphs best represent the graphical relationship between Kinetic Energy $(K.E)$ and momentum $\left(P\right)$ of a body in motion?

An object of mass $15\mathrm{kg}$ is moving with uniform velocity of $4\mathrm{m}/\mathrm{s}$. What is the kinetic energy possessed by the object?

A bullet mass $110 \mathrm{g}$ moves with a velocity of $800 \mathrm{m} {\mathrm{s}}^{-1}$. It penetrates $35 \mathrm{cm}$ into a target which is stationary and then comes to rest. Find the average retarding force offered by the target and the kinetic energy possessed by the bullet. 

If a bullet of mass $80 \mathrm{g}$ moves with a velocity of $700 \mathrm{m} {\mathrm{s}}^{-1}$. It penetrates $25 \mathrm{cm}$ into a target which is not moving and then comes to rest. Find the kinetic energy possessed by the bullet and also the average retarding force offered by the target. 

A bullet has a mass of$100 \mathrm{g}$ and it moves with a velocity of $500 \mathrm{m} {\mathrm{s}}^{-1}$. It penetrates $25 \mathrm{cm}$ into a target which is not moving and then comes to rest. Find the kinetic energy possessed by the bullet and also the average retarding force offered by the target.

If a bullet of mass $70 \mathrm{g}$ moves with a velocity of $750 \mathrm{m} {\mathrm{s}}^{-1}$. It penetrates $30 \mathrm{cm}$ into a target which is not moving and then comes to rest. Find the kinetic energy possessed by the bullet and also the average retarding force offered by the target. 

Assertion: If velocity of a moving body is increased to double, then its kinetic energy increases four times.

Reason: Kinetic energy is directly proportional to the square of velocity.

Name the kind of energy used in the following.

Name the kind of energy used in the following.

The mass of a body which has $10 \mathrm{J}$ of kinetic energy while moving at a speed of $2 \mathrm{m} {\mathrm{s}}^{-2}$ is _____ $\mathrm{kg}$.

Which of the following vehicle will be easier to stop? Assume same speed for all vehicles.

If velocity of a moving body becomes one-fourth while the mass remains constant, the kinetic energy of the body