Science Questions

Which of these is the most common form of energy released during friction?

A spring is stretched by 2 cm. If the spring constant is 100 N/m, the energy stored is:

Dimensions of work are:

Energy can be defined as the capacity to exert:

If a man pushes a wall and the wall does not move, the work done is:

Which of these is a renewable source of energy?

A car of mass 1000 kg is moving with a velocity of 10 m/s. Its kinetic energy is:

A person holds a book of mass 1 kg in his hand for 10 minutes at a height of 1 m. The work done is:

If a force F = 20 N is applied at an angle of 90 degrees to the displacement d = 5 m, the work done is:

Power is equal to:

The energy of water stored in a dam is:

A body of mass 5 kg has a potential energy of 490 J. Its height from the ground is: (g = 9.8 m/s^2)

When we step on a gas pedal of a car, chemical energy of fuel is primarily converted into:

If a force of 10 N is applied on an object and the object does not move, the work done by the force is:

What is the work done by a person in carrying a 20 kg bag on his head while walking 50 m on a horizontal road?

In a torch cell, chemical energy is converted into:

A body is thrown vertically upwards. At the highest point, it has:

The work done against friction is always converted into:

If air resistance is neglected, the sum of PE and KE of a falling body is:

What is the gravitational potential energy of a 2 kg object at a height of 5 m from the earth? (g = 9.8 m/s^2)