<P> The simple gravity pendulum is an idealized mathematical model of a pendulum . This is a weight ( or bob ) on the end of a massless cord suspended from a pivot , without friction . When given an initial push , it will swing back and forth at a constant amplitude . Real pendulums are subject to friction and air drag , so the amplitude of their swings declines . </P>
<P> The simple gravity pendulum is an idealized mathematical model of a pendulum . This is a weight ( or bob ) on the end of a massless cord suspended from a pivot , without friction . When given an initial push , it will swing back and forth at a constant amplitude . Real pendulums are subject to friction and air drag , so the amplitude of their swings declines . </P>
what is the bottom of a pendulum called
what is the bottom of a pendulum called
a weight or bob
a weight or bob