Question
Asked Dec 17, 2019
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A bowling ball is suspended from the
ceiling of a lecture hall by a strong cord.
The ball is drawn away from its equilib-
rium position and released from rest at
the tip of the demonstrator's nose, as
shown in Figure CQ5.6. (a) If the dem-
onstrator remains stationary, explain why
the ball does not strike her on its return
swing. (b) Would this demonstrator be
safe if the ball were given a push from its
starting position at her nose?
Figure CQ5.6
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A bowling ball is suspended from the ceiling of a lecture hall by a strong cord. The ball is drawn away from its equilib- rium position and released from rest at the tip of the demonstrator's nose, as shown in Figure CQ5.6. (a) If the dem- onstrator remains stationary, explain why the ball does not strike her on its return swing. (b) Would this demonstrator be safe if the ball were given a push from its starting position at her nose? Figure CQ5.6

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Paert A:...

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The ball earth system initially has gravitational potential energy but not kinetic energy. Then, when it reaches its initial position, the kinetic energy returns to zero. Due to air resistance, the ball reaches slightly below the initial point. Due to this reason it will not hurt the demonstrator.

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