Physics, asked by Anonymous, 1 year ago

Give some important formulas of chapter 'Work andEnergy.'


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Answered by Aneelmalhi
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Answered by saniya9343
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Terms and Formulae

Terms

Conservative Force  -  Any force which conserves mechanical energy, as opposed to a nonconservative force. See statement of conservation of mechanical energy.

Conservative System  -  A system in which energy is conserved.

Energy  -  The ability to do work.

Kinetic Energy  -  The energy of motion.

Nonconservative Force  -  Any force which does not conserve mechanical energy, as opposed to a conservative force.

Path Independence  -  Property of conservative forces which states that the work done on any path between two given points is the same.

Potential Energy  -  The energy of configuration of a conservative system. For formulae, see Definition of potential energy, gravitational potential energy, and Definition of potential energy given a position-dependent force.

Total Mechanical Energy  -  The sum of the kinetic and potential energy of a conservative system. See definition of total mechanical energy.

Work  -  A force applied over a distance. For formulas, see work done by a constant force parallel to displacement and work done by any constant force, and work done by a position-dependent force.

Joule  -  The units of work, equivalent to a Newton-meter. Also units of energy.

Power  -  Work done per unit time. For formulas, see Formula for average power, Definition of instantaneous power, and formula for instantaneous power.

Watt  -  Unit of power; equal to joule/second.

Formulas

 

Work Done By A Constant Force Parallel To DisplacementW = Fx

 

Work Done By Any Constant ForceW = Fx cosθ

 

Work-Energy TheoremW = ΔK

 

Formula For Average Power=

 

Definition Of Instantaneous PowerP =

 

Formula For Instantaneous PowerP = Fv cosθ

 

Work Done By A Position-Dependent ForceW =F(x)dx force.

 

Definition Of Potential Energy.ΔU = - W

 

Gravitational Potential Energy.UG = mgh

 

Statement Of Conservation Of Mechanical Energy.Δ(U+K) = 0

 

Definition Of Total Mechanical Energy.U + K = E

 

Definition Of Potential Energy Given A Position-Dependent Force.ΔU = -F(x)d


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