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Work, Energy and Power

Get chapter-wise JEE Main & Advanced questions with solutions

Q JEE MAIN 2019
A force acts on a 2 kg object so that its position is given as a function of time as $x=3 t^2+5$. What is the...
JEE Main Physics Easy
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Q JEE MAIN 2019
A spring whose unstretched length is I has a force constant k . The spring is cut into two pieces of unstretched lengths $\mathrm{l}_1$ and...
JEE Main Physics Medium
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Q JEE MAIN 2020
One end of a straight uniform 1 m long bar is pivoted on horizontal table. It is released from rest when it makes an angle...
JEE Main Physics Medium
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Q JEE MAIN 2020
If the potential energy between two molecules is given by $\mathrm{U}=\frac{\mathrm{A}}{\mathrm{r}^6}+\frac{\mathrm{B}}{\mathrm{r}^{12}}$, then at equilibrium, separation between molecules, and the potential energy are
JEE Main Physics Easy
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Q JEE-MAIN 2020
A body of mass 2 kg is driven by an engine delivering a constant power of 1 J/s. The body starts from rest and moves...
JEE Main Physics Easy
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Q JEE MAIN 2020
Two particles of equal mass $m$ have respective initial velocities $u \hat{i}$ and $u\left(\frac{\hat{i}+\hat{j}}{2}\right)$. They collide completely inelastically. The energy lost in the process is:
JEE Main Physics Medium
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Q JEE MAIN 2020
Consider a force $\vec{F}=-x \hat{i}+y \hat{j}$. The work done by this force in moving a particle from point $\mathrm{A}(1,0)$ to $B(0,1)$ along the line segment...
JEE Main Physics Easy
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Q JEE Main 2019
A block of mass $m$ is kept on a platform which starts from rest with constant acceleration $\frac{g}{2}$ upward, as shown in fig. Work done...
JEE Main Physics Medium
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Q JEE MAIN 2020
A person pushes a box on a rough horizontal platform surface. He applies a force of 200 N over a distance of 15 m. Thereafter,...
JEE Main Physics Medium
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Q JEE MAIN 2020
A uniformly thick wheel with moment of inertia I and radius R is free to rotate about its centre of mass (see fig.), A massless...
JEE Main Physics Hard
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