Physics

The energy possessed by a compressed spring is:

If the mass of an object is doubled and its velocity is halved, what happens to its kinetic energy?

Work done by a centripetal force on a body moving in a circle is:

The unit of work in CGS system is:

Which of the following energy transformations takes place in an electric motor?

A machine does 2000 J of work in 20 seconds. Calculate its power.

What is the relationship between momentum (p) and kinetic energy (K)?

A man carries a heavy suitcase on his head and waits for a bus on a horizontal platform. The work done by him is:

Commercial unit of electrical energy consumption is:

When the force applied and displacement are in opposite directions, the work done is:

The potential energy of an object at the surface of the earth is usually taken as:

If two bodies of mass 1 kg and 4 kg have the same kinetic energy, the ratio of their momenta is:

A bullet fired from a gun can pierce a wooden block due to its:

Which of these devices converts mechanical energy into electrical energy?

What is the work done by a person in lifting a 2 kg mass to a height of 5 m? (g=9.8 m/s^2)

In a hydroelectric power plant, which energy is finally converted into electrical energy?

The Law of Conservation of Energy states that:

A crane lifts a load of 1000 N through a vertical height of 10 m in 5 seconds. Its power is:

When a ball is thrown upwards, the work done by the gravitational force is:

If a force of 1 Newton moves a body by 1 meter in its own direction, the work done is: