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Chapter 4: Q13Q (page 83)
(a) Is it possible to be accelerating while traveling at constant speed? Is it possible to round a curve with (b) zero acceleration and (c) a constant magnitude of acceleration?
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In basketball, hang is an illusion in which a player seems to weaken the gravitational acceleration while in mid-air. The illusion depends much on a skilled player’s ability to rapidly shift the ball between hands during the flight, but it might also be supported by the longer horizontal distance the player travels in the upper part of the jump than in the lower part. If a player jumps with an initial speed ofat an angle of , what percent of the jump’s range does the player spend in the upper half of the jump (between maximum height and half maximum height)?
Snow is falling vertically at a constant speed of . At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight, level road with a speed of ?
A plane flies east from city A to city B inand thensouth from city B to city C in. For the total trip, what are the (a)magnitude and(b)direction of the plane’s displacement, the(c)magnitude and(d)direction of the average velocity, and(e)it’s average speed?
A car travels around a flat circle on the ground, at a constant speed of. At a certain instant the car has an acceleration ofrole="math" localid="1657010334562" toward the east. What are its distance and direction from the center of the circle at that instant if it is traveling (a) clockwise around the circle and (b) counterclockwise around the circle?
In Fig. 4-48a, a sled moves in the negative X direction at constant speedwhile a ball of ice is shot from the sled with a velocityrelative to the sled. When the ball lands its horizontal displacementrelative to the ground (from its launch position to its landing position) is measured. Figure 4-48bgivesas a function of. Assume the ball lands at approximately its launch height. What are the values of (a)and (b)? The ball’s displacementrelative to the sled can also be measured. Assume that the sled’s velocity is not changed when the ball is shot. What iswhenis (c)and (d) 15.0 m/s?
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