Mechanics:Work,Energy and Power
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1
Work
Work done by a constant force is the product of the magnitude of the force, the magnitude of the displacement and the angle between the force and the displacement
2
Positive work
The kinetic energy of the object increases
3
Negative Work
The kinetic energy of the object decreases
4
Work energy Theorem
The net/total work done on an object is equal to the change in the objects kinetic energy OR the work done on an object by a resultant/net force is equal to the change in the objects kinetic energy
5
Principle of conservation of mechanical energy
The total mechanical energy in an isolated system remains constant
6
Conservation force
A force for which the work done in moving an object between two points is independent of the path taken.
7
Non conversative force
A force for which the work done in moving an objects between two points depends on the path taken
8
Power
The rate at which work is done or energy is expanded
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