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What are important topics in Work energy & Power?
1.Work energy & Theorem
2.Collision in 1 & 2 dimension
3.Potential energy of a spring
4.Motion along a virtical circle.
What are SI & cgs unit of energy?
Si – joule
cgs – erg
Is friction a conservative force?
No, friction is not a conservative force because work done by conservative force does not depend upon the path followed by object.
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Q-1.What is the formula of Potential Energy?
A-1.Gravitational Potential Energy is mgh
Where m = Mass of object
g = Acceleration due to gravitt
h = height of object
# Potential e energy of a spring = 1/2
Where x = displacement
Q-2.What’s the difference between Energy & Work?
A-2.Work is action on the object causing some displacement.
Energy is property of a system or ability to do work. Energy is result of work performed.
Q-3.Give Examples of Potential & Kinetic energy.
A-3.Example of kinetic Energy
1.An airplane has a large amount of kinetic energy in flight.
2.Movement of planet around sun.
Example of Potential energy.
#A Raised weight
# Water stored in a dam at some height
# A book kept on a table