Chapter 3: Q2. (page 67)
Can you conclude that a car is not accelerating if its speedometer indicates a steady? Explain.
No, based on the speedometer reading, you cannot conclude that a car is not accelerating.
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For the vectors shown in Fig. 3–35, determine (a), (b)., and(c).
FIGURE 3-35
In archery, should the arrow be aimed directly at the target? How should your angle of aim depend on the distance to the target?
The cliff divers of Acapulco push off horizontally from rock platforms about 35 m above the water, but they must clear rocky outcrops at water level that extend out into the water 5.0 m from the base of the cliff directly under their launch point. See Fig. 3–53. What minimum push-off speed is necessary to clear the rocks? How long are they in the air?
Suppose the rescue plane of Problem 31 releases the supplies a horizontal distance of 425 m in advance of the mountain climbers. What vertical velocity (up or down) should the supplies be given so that they arrive precisely at the climbers’ position (Fig. 3–39)? With what speed do the supplies land?
FIGURE 3-39Problem 32
One car travels due east at, and a second car travels north at. Are their velocities equal? Explain.
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