5. Energy & Work Flashcards
what is energy
the capacity for doing work
what is kinetic energy
energy possessed by a moving object due to its motion
what is the equation for kinetic energy
KE = 1/2 mv^2
what is potential energy
the stored energy of position possessed by an object
what are the 3 types of potential energy
gravitational
elastic
electrical
what is gravitational potential energy
energy derived from force of gravity
energy stored in an object as a result of its heigh or vertical position
what is the equation for gravitational potential energy
Ep = mgh
what is elastic potential energy
energy stored in elastic materials as the result of their compressing/stretching
what is the equation for elastic potential energy
Ep = (kx^2)/2
what is electrical potential energy
energy resulting from coulomb force associated with point charges within a defined system
what is the equation for electrical potential energy
Ep = kq1q2/r
k = spring constant (8.99 x 10^9Nm^2/C^2)
what is the unit for potential and kinetic energy
Joules
what is work
transfer of energy by a force
what is the unit of work
joules
what is the equation for work
W = F x d x cos(angle between F&d)
