20. A pendulum is launched from a point that is a height h above its lowest point in two different ways (Fig. 8–28). During both launches, the pendulum is given an initial speed of 3.0 m/s. On the first launch, the initial velocity of the pendulum is directed upward along the trajectory, and on the second launch it is directed downward along the trajectory. Which launch will cause the highest speed when the pendulum bob passes the lowest point (First launch) of its swing? Explain. FIGURE 8-28 (Second launch) Question 20.

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Chapter1: Units, Trigonometry. And Vectors
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20. A pendulum is launched from a point that is a height h
above its lowest point in two different ways (Fig. 8–28).
During both launches, the pendulum is given an initial speed
of 3.0 m/s. On the first launch, the initial velocity of the
pendulum is directed upward along
the trajectory, and on the second
launch it is directed downward
along the trajectory. Which
launch will cause the
highest speed when
the pendulum bob
passes the
lowest point
of its swing?
Explain.
(First launch)
FIGURE 8-28
(Second launch)
Question 20.
Transcribed Image Text:20. A pendulum is launched from a point that is a height h above its lowest point in two different ways (Fig. 8–28). During both launches, the pendulum is given an initial speed of 3.0 m/s. On the first launch, the initial velocity of the pendulum is directed upward along the trajectory, and on the second launch it is directed downward along the trajectory. Which launch will cause the highest speed when the pendulum bob passes the lowest point of its swing? Explain. (First launch) FIGURE 8-28 (Second launch) Question 20.
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Given data:

Initial velocity = 3 m/s

Need to determine in which pass the velocity of the pendulum at the lowest.

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