Reflection. A wave pulse on a string has the dimensions shown in Fig. E15.31 at t = 0. The wave speed is 5.0 m>s. (a) If point O is a fixed end, draw the total wave on the string at t = 1.0 ms, 2.0 ms, 3.0 ms, 4.0 ms, 5.0 ms, 6.0 ms, and 7.0 ms. (b) Repeat part (a) for the case in which point O is a free end.
PH 101- Week 2 Notes 3 basic quantities to describe the motion of some system 1. Displacement- length, vector quantity (has direction/sign) a. x=x -2 1 t=t 2t 1 2. Velocity- rate at which position is changing with time; units of length/time (m/s) a. Average velocity v(overline)=x/t =(x -x )2(t1-t 2 1 b. Position-time plot (slope=average velocity) c. x=v(overline)t d. Instantaneous velocity: velocity at some instance i. Magnitude of instantaneous speed e. Suppose you want to take the instantaneous velocity at t 1 i. Slope of the tangent line at t=t 1 ii. =lim xf-x1 tft1 f -1 v=lim x -x 2 1 t2t 1 -2
