Module 8: Work and Energy Flashcards
Define Energy
The ability to do work.
Define Potential Energy
Energy that is stored, ready to do work
Define Kinetic energy
Energy in motion
Define Mechanical energy
Energy associated with the movement (or potential movement) of objects
Define Chemical energy
Energy associated with the chemical bonds of a molecule
Define Electrical energy
Energy associated with the motion (or potential motion) of charged particles
Define Heat
Energy that is transferred from one object to another as a result of a difference in temperature
Define Power
The amount of energy expended per second.
Power is the time rate of change of the work done
What is the work formula?
W = F|| * Δx
W —> work
Δx —> Magnitude of the displacement vector
F|| —> Magnitude of the component of the force vector that is parallel to the displacement vector
Potential Energy formula?
PE = mgh
PE —> Potential Energy
m —> Mass
g —> Acceleration due to gravity
h —> Height
Kinetic Energy formula?
KE = 1/2 * m * v2
KE —> Kinetic Energy
m —> Mass
v —> Velocity
Power formula?
P = ΔW / Δt
P —> Power
ΔW —> Work done within a certain time interval
Δt —> Time interval
What is the SI unit for power?
Joules / sec = Watt
Define Work
The product of the displacement of an object and the component of the applied force that is parallel to the displacement.
