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  <h1 style='background:white'><span style='font-family:&quot;Verdana&quot;,sans-serif;
color:black'>P7-4</span></h1>
  <p style='background:white'><span style='font-family:&quot;Verdana&quot;,sans-serif;
color:black;'><img width=784 height=449 id="_x0000_i1025"
src=p7-4.jpg></span></p>
  <p style='background:white'><span style="font-family:&quot;Verdana&quot;,sans-serif;
color:black">The <a
href="https://www.youtube.com/watch?v=kHc4xFgysio">Whitworth
    Quick Return Mechanism </a>converts rotational motion to asymmetric reciprocal
    motion. The web site listed provides a splendid animation. Points A and C are
    vertically aligned with center to center distance of 130mm. At this instant the
    slotted arm is angled 25deg from the vertical. The pin P is 60mm from the
    center C of the driving wheel. Slider D is constrained to move horizontally.
    Pin E on D slides in the slotted arm. Pin E is 300mm from point A at this
    instant. If the driving wheel is rotating CW at angular velocity of 0.deltadeltadeltadeltarad/s
    and angular acceleration of 0.1deltadeltadeltadeltarad/s^2 determine the absolute velocity and
  acceleration of Slider D. Are these in the right directions?</span></p>
  
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