# Work, Energy and Power · Physics · COMEDK

Start Practice## MCQ (Single Correct Answer)

COMEDK 2024 Evening Shift

A scooter moves with a speed of $$7 \mathrm{~ms}^{-1}$$, on a straight road and is stopped by applying the brakes. Before stopping, the scooter travel...

COMEDK 2024 Evening Shift

When water falls from a height of $$80 \mathrm{~m}$$ at the rate of $$20 \mathrm{~kg} \mathrm{~s}^{-1}$$ to operate a turbine the losses due to fricti...

COMEDK 2024 Morning Shift

The power of a gun which fires 120 bullet per minute with a velocity $$120 \mathrm{~ms}^{-1}$$ is : (given the mass of each bullet is $$100 \mathrm{~g...

COMEDK 2023 Morning Shift

A particle is projected at an angle $$30^{\circ}$$ with horizontal having kinetic energy $$K$$. The kinetic energy of the particle at highest point is...

COMEDK 2023 Morning Shift

A long spring, when stretched by a distance $$x$$, has potential energy $$U$$. On increasing the stretching to $$n x$$, the potential energy of the sp...

COMEDK 2023 Evening Shift

If reaction is $$\mathrm{R}$$ and coefficient of friction is $$\mu$$, what is work done against friction in moving a body by distance $$\mathrm{d}$$ ?...

COMEDK 2022

If kinetic energy of a body is increased by 300%, then percentage change in momentum will be

COMEDK 2022

A particle of mass $$m$$ is moving in a horizontal circle of radius $$r$$ under a centripetal force given by $$\left(\frac{-K}{r^2}\right)$$, where $$...

COMEDK 2021

Two masses of 1g and 9g are moving with equal kinetic energy. The ratio of magnitude of their momentum is

COMEDK 2021

For motion under central forces, which quantity will be conserved?

COMEDK 2020

A particle of mass m is moving in a horizontal
circle of radius R under a centripetal force equal
to $$-\frac{A}{R^2}$$ (A = constant). The total ener...

COMEDK 2020

A force of 20 N is applied on a body of mass
5 kg resting on a horizontal plane. The body
gains a kinetic energy of 10 J after it moves a
distance 2 m...