Question

[1] CONSIDER THESE TWO Cases :
     1. A ball moves in uniform circular motion.
          (i) Sketch a two dimensional position plot of the functions x(t) and y(t).
             Extra credit: What type of plot is this? (5 points).
          (ii) On your plot, draw in five different velocity vectors at different times.
          (iii) Is there an acceleration ? Why or why not?
     2. A ball moves in a straight line while its speed decreases.
          (i) Sketch a two dimensional position plot of the functions x(t) and y(t).
          (iI) Is there an acceleration? Why or why not?
          (iii) Give a real world example of what situation this case could describe.
     

[2] A ball moves in a straight line at constant speed. Draw the trajectory of the ball.   Define the position of two different origins that have the following properties (you can label them origin 1 and origin 2).
     1. Define the origin 1 such at t=0 there is an angular momentum given by mLv: where m is the mass of the ball, v is the velocity of the ball, and L has dimensions of length (label this).
     2. Define the origin 2 such at t=0 there is NO angular momentum.

[3] If someone handed you a broom and asked you to find its center of mass. Without doing any math, how would you do it?

Answer 1