Work and Energy...

A block of mass $$10kg$$ accelerates uniformly from rest to a speed of $$2m/s$$ in $$20$$ sec. The average power developed in time interval of $$0$$ to $$20$$ sec is

Which of the following statements is incorrect?

A force $$(4\hat {i} + \hat {j} - 2\hat {k})N$$ acting on a body maintains its velocity at $$(2\hat {i} + 2\hat {j} + 3\hat {k})ms^{-1}$$. The power exerted is:

Calculate work done on object where applied force is $$10N$$ and distance is $$10m$$:

A raindrop of mass $$1\ g$$ falling from a height of $$1\ km$$ hits the ground with a speed of $$50\ ms^{-1}$$. Which of the following statements is correct?
(Take $$g = 10\ ms^{-2})$$

A block of mass $$2\ kg$$ initially at rest moves under the action of an applied horizontal force of $$6\ N$$ on a rough horizontal surface. The coefficient of friction between block and surface is $$0.1$$. The work done by the applied force in $$10\ s$$ is (Take $$g = 10\ ms^{-2})$$.

Mohan uses one television of $$100$$ W for $$10$$ hrs. How much energy is consumed by Mohan?

Which of the following bodies has the largest kinetic energy?

When a men walks on a horizontal surface then work done by

A body of mass 15 kg is raised from certain depth. If the work done in raising it by 10 m is 1620 J, its velocity at this position is