List of top Physics Questions on work, energy and power asked in JKCET

If the unit of force and length are doubled, the unit of energy will be
You lift a heavy book from the floor of the room and keep it in the bookshelf having a height of 2m. This process takes 5 seconds. The work done by you will depend on
Energy a system possesses because of the force exerted on its mass by a gravitational or electromagnetic field with respect to a reference surface.
A force $ F = 3x^2 + 2x + 1 $ acts on a body in the $ x $ -direction. The work done by this force during a displacement from $ x = -1 $ to $ +1 $ is
A moving block having mass $m$, collides with another stationary block having mass $4\,m$. The lighter block comes to rest after collision. When the initial velocity of the lighter block is $v$, then the value of coefficient of restitution (e) will be
A bicyclist comes to a skidding stop in $10\, m$. During this process, the force on the bicycle due to the road is $200\, N$ and is directly opposed to the motion. The work done by the cycle on the road is
If kinetic energy of a body is increased by $300$ % then percentage change in momentum will be
An athlete throws the shot-put of mass $ 4\,kg $ with initial speed of $ 2.2\,ms^{-1} $ at $ 41^{\circ} $ from a height of $ 1.3\,m $ from the ground. What is the KE of the shot-put when it reaches the ground? (Ignoring the air resistance and gravity $ g=9.8 \, m/s^{-2} $ )
A crane lifts weight of $ 75\,kg $ to a height of $ 15\,m $ in $ 15\,s $ . The power of the crane is (assuming $ g=9.8\,m/s^{2} $ )
The scalar product of two vectors $ \vec{A} =2\hat{i}+2\hat{j}-\hat{k} $ and $\vec{B} = -\hat{j}+\hat{k}, $ is given by
If two bodies stick together after collision and move as a single body, the collision is said to be
A gardener pushes a lawn roller through a distance $ 20\,m $ . If he applies a force of $ 20\,kg\,wt $ in a direction inclined at $ 60^{\circ} $ to the ground, the work done by him is
If the force acting on a body is inversely proportional to its speed, then its kinetic energy is
In inelastic collision
A stationary bomb explodes into two parts of masses in the ratio of $ 1:3 $ . If the heavier mass moves with a velocity $ 4\,m/s, $ what is the velocity of lighter part?
Which of the following graphs shows variation of potential energy ($U$) with position x?
A body of mass $ 4\,kg $ moving with velocity $ 12\,m/s $ collides with another body of mass $ 6 \,kg $ at rest. If two, bodies stick together after collision, then the loss of kinetic energy of system is
A particle moves along the $x$-axis from $x=x_{1}$ to $x=x_{2}$ under the action of a force given by $F=2 x$. Then the work done in the process is