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Unformatted text preview: hey then measure the speed of the tip of the stick with their motion sensor. Do they measure
the same speed?
Both situations can be treated as a conservation of energy where gravitational potential energy
becomes rotational kinetic energy. The simple pendulum will have a change in gravitational
potential energy equal to the length of the string; however, the rod will have a change half of that
value since the center of mass of the rod is not at the tip as it is for the simple pendulum. The
two setups also have different moments of inertia. Write a conservation of energy equation for
each of the two setups. Solving for the translational speeds of the tips, the pendulum will
measure
while the speed of the rod will measure
Therefore, the tip of the stick is faster than the pendulum.
L center of mass, m v Physics 211 Week 8 Energy Conservation: Pothole (Solutions)
A car is traveling along a horizontal road when it suddenly encounters a pothole, in which the
level of the road abruptly changes by a height h. The su...
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 Spring '09
 TonyLiss
 Energy

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