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Work, energy, and power - Coggle Diagram
Work, energy, and power
Power
The rate at which work is done
Equations
Power = Work / time=(Force*Displacement)/Time
Power = Force*(Displacement/Time)
Power=Force*Velocity
Unit
Watt = Joule/second
Forces
Internal
Gravity forces
Magnetic force
Electrical force
Spring force
External
Applied force
Normal force
Tension force
Friction force
Air resistance force
Work
Energy transferred to/from an object by a force along a displacement
Key ingredients
Force
Displacement
Cause
Equation
W = F • d • cos Θ
Theta
The angle between any two plane
Negative work
When a force has a component opposite or against the displacement
The object loses energy
Unit
Joule (J) = 1 Newton * 1 Meter
Positive work
The object gains energy
Energy
Mechanical Energy
Energy possessed by an object due to its motion or position
Can be either potential or kinetic
Ability to do work
Equations
TME = PE + KE
TME = PEgrav + PEspring + KE
Potential Energy
Stored energy of an object as the result of its position
Gravitational Potential Energy
Energy stored in an object as the result of its vertical position or height
PEgrav = mass • g • height
Elastic Potential Energy
Energy stored in elastic materials as the result of their stretching or compressing
Equations
Fspring = k • x
PEspring = 0.5 • k • x2
k = spring constant
x = amount of compression
(relative to equilibrium position)
Kinetic Energy
Energy of motion
Types
Vibrational
Rotational
Translational
KE = 0.5 • m • v2