Advertisements
Advertisements
प्रश्न
Define the term 'energy' of a body. What is the SI unit of energy.
Advertisements
उत्तर
Energy is the ability to do work. The amount of energy possessed by a body is equal to the amount of work it can do when its energy is released. It is a scalar quantity as it has only magnitude.
The SI unit of energy is Joule (J).
APPEARS IN
संबंधित प्रश्न
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
What kind of energy is possessed by the following?
A compressed spring ____________.
Water stored in a dam possesses :
Name the device or machine which convert :
Electrical energy into heat energy.
What kind of energy transformation take place at a hydroelectric power station?
When an object falls freely towards the earth, then its total energy :
In the case of negative work, the angle between the force and displacement is
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 s is
