Work and Energy...

One megawatt is .................... times that of one kilowatt.

If force and displacement of the particle (in direction of force) are doubled, Work should be :

When a force retards the motion of a body, the work done is :

The work done in holding $$15\ kg$$ suitcase while waiting for a bus for $$45$$ minutes is :

Choose the correct option.

How much work is done by a force 50 N moving an object through a distance 10 m in the direction of force ?

What will be the potential energy of a body of mass 5 kg kept at a height of 10 m ?

The work done by a force on a body will be positive if the body -

An electric toaster draws $$8\ A$$ current in a $$220\ V$$ circuit. It is used for $$2\ hr$$. What is the cost of operating the toaster if the cost of electrical energy is $$Rs.\ 4.5 / kWh$$?

In our household applications, commercial unit of electricity is used. One unit is equal to: