Advertisements
Advertisements
Question
What is potential energy ? State its unit.
Advertisements
Solution
The energy of a body at rest is called the potential energy. It is defined as follows :
Potential energy of a body is the energy possessed by it due to its state of rest or position. Actually, it is the work spent in bringing the body to that state of rest or position.
It is written as P.E. or U.
The S.I. unit of potential energy is Joules.
APPEARS IN
RELATED QUESTIONS
Write true or false of the following statement.
One form of energy cannot be converted into another form.
Fill in the blank
An electric fan converts electrical energy into ______ energy.
Select the correct alternatives
The correct statement is
Define the term efficiency of a machine.
Tick the most appropriate answer.
The force applied on a machine to do work is called the
Answer the following in short.
What do you understand by the term efficiency of a machine’?
Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour
The commercial unit of energy is :
Observe the picture and put a tick (✓) if work is done and put a cross (x) if work is not done.
 |
 |
 |
 |
 |
 |
When a body falls freely towards the earth, then its total energy
