The applet above is similar to the Weight
Distribution applets seen previously. Recall from your last encounter
with this type of applet, you were asked to predict what phenomenon
explains how your weight is distributed to the front and rear tires of
the bicycle.
What you should be aware of is that not only do forces have to be
balanced to maintain an object in static equilibrium, but moments must
also be balanced. To understand this in greater detail, look at the Moment Equilibrium concept
page.
Revisiting the problem introduced earlier in the module, suppose that
during normal riding your weight was distributed as follows, 150 lb on
the seat, 25 lb on the pedals, and 10 lb on the handlebars. Using the
force and moment equilibrium conditions, calculate the front and rear
tire reactions. Confirm your answer with the applet. Necessary
dimensions are given in the table below.
Once again suppose that you encountered a hill and were in a
"climbing" position such that you now had 20 lb on the seat, 125 lb on
the pedals, and 40 lb on the handlebars. Calculate how the front and
rear tire reactions will have changed and then check your results with
the applet.
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