We can describe the motion of a particle in a number of ways, and
the choice of the most convenient or appropriate way depends a great
deal on experience and on how the data are given. Let us obtain an
overview of the several methods developed in this chapter by referring
to Fig. 2/1, which shows a particle P moving along some general path
in space. If the particle is confined to a specified path, as with a bead
sliding along a fixed wire, its motion is said to be constrained. If there
are no physical guides, the motion is said to be unconstrained. A small
rock tied to the end of a string and whirled in a circle undergoes constrained
motion until the string breaks, after which instant its motion is
unconstrained.
We can describe the motion of a particle in a number of ways, andthe choice of the most convenient or appropriate way depends a greatdeal on experience and on how the data are given. Let us obtain anoverview of the several methods developed in this chapter by referringto Fig. 2/1, which shows a particle P moving along some general pathin space. If the particle is confined to a specified path, as with a beadsliding along a fixed wire, its motion is said to be constrained. If thereare no physical guides, the motion is said to be unconstrained. A smallrock tied to the end of a string and whirled in a circle undergoes constrainedmotion until the string breaks, after which instant its motion isunconstrained.
การแปล กรุณารอสักครู่..
