Work, Energy and Power

When a body moves with a constant speed along a circle

The hydraulic press given in the figure is used to raise the mass M through a height of $0.5 \mathrm{cm}$ by performing $500 \mathrm{J}$ of work at the small piston. The diameter of the large piston is $10 \mathrm{cm}$, while that of the smaller one is $2 \mathrm{cm}$. The mass M is:

Which energy does not convert into work done completely.

The rate of work done is called

If speed of a car becomes $2$ times, its kinetic energy becomes

What is the SI unit of work?

What is the CGS unit of work?

The work done to increase the velocity of a car from $30 \mathrm{km} {\mathrm{h}}^{-1}$ to $60 \mathrm{km} {\mathrm{h}}^{-1}$, if the mass of the car is $1500 \mathrm{kg}$, is:

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

Spring constant of a spring is $K = 6 \times {10}^3 \mathrm{N}/\mathrm{m}$. Work done to stretch it ${10}^{-2} \mathrm{m}$from mean position is

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

$1\mathrm{kWh}$ equal to

A person of mass $100 \mathrm{kg}$ reaches a height in $10 \mathrm{seconds}$. Find the power used by the person ($g=10 \raisebox{1ex}{$\mathrm{m}$}\!\left/ \!\raisebox{-1ex}{${\mathrm{s}}^2$}\right.$).

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?

Heat and work done by the heat was discovered by

In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be

The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :

Flying birds has

A rod of length $l$ and mass $m$ fixed at one end, is hanging vertically. The other end is now raised so that the rod makes an angle $30°$ with horizontal line. The work done in the process will be :

A force of $40 \mathrm{N}$ acts on a body, and body moves through a distance of $2$ metre at an angle of $45°$ in the direction of the force. The work done by the force is