Work, Energy and Power
Which of the following is not a scalar quantity?
What is the dimensional formula of work?
When a conservative force does positive work on a body, the potential energy of the body:
Which of the following is a non-conservative force?
The kinetic energy $K$ of a body of mass $m$ and momentum $p$ is given by:
If the momentum of a body is increased by 100%, its kinetic energy will increase by:
Work-energy theorem states that the change in kinetic energy of a body is equal to:
Which of the following collisions conserves both linear momentum and total kinetic energy?
Power is defined as the scalar product of force and:
One kilowatt-hour (kWh) is equal to how many joules?
The potential energy of a spring stretched by a distance $x$ with spring constant $k$ is:
When a person carries a suitcase and walks horizontally on a platform, the work done by the gravitational force on the suitcase is:
In an elastic collision between two bodies of equal masses moving in opposite directions, their velocities:
The coefficient of restitution ($e$) for a perfectly inelastic collision is:
Which law is fundamentally behind the principle of conservation of mechanical energy for conservative forces?
A light body and a heavy body have the same kinetic energy. Which one has greater momentum?
The unit of power in SI system is:
Work done by a centripetal force in uniform circular motion is:
Which of the following energy transformations takes place in a hydroelectric power plant?
What happens to the total mechanical energy of an isolated system in the presence of non-conservative forces like friction?