Advertisements
Advertisements
Question
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
Advertisements
Solution
The sum of the potential and kinetic energies of a body is called mechanical energy.
RELATED QUESTIONS
State the condition under which the mechanical energy is conserved.
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.
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
What kind of energy is possessed by the following?
A compressed spring ____________.
Define the term 'energy' of a body. What is the SI unit of energy.
What are the various forms of energy?
Water stored in a dam possesses ______.
Name the device or machine which convert :
Electrical energy into sound energy.
Name the device or machine which convert :
Heat energy into kinetic energy (or mechanical energy).
Describe the energy changes which take place in a radio.
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
Name the energy transfers which occur when there is a picture on a television screen.
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
When an object falls freely towards the earth, then its total energy :
An object is falling freely from a height x. After it has fallen a height `pi/2` , it will possess :
The device which converts mechanical energy into energy which runs our microwave oven is :
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
