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Chapter 4: Q. 41 (page 107)
II An electric fan goes from rest to in . What is its angular acceleration?
The angular acceleration of the fan is .
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Answer Problems 3 through 5 by choosing one of the eight labeled acceleration vectors or selecting option
4. At this instant, the particle is speeding up and curving upward. What is the direction of its acceleration?
While driving north at during a rainstorm you notice that the rain makes an angle of with the vertical. While driving back home moments later at the same speed but in the opposite direction, you see that the rain is falling straight down. From these observations, determine the speed and angle of the raindrops relative to the ground.
I FIGURE EX4.36 shows the angular velocity graph of the crankshaft in a car. What is the crankshaft's angular acceleration at (a) , (b) , and (c) ?
Starting from rest, a DVD steadily accelerates to in , rotates at this angular speed for , then steadily decelerates to a halt in . How many revolutions does it make?
A gray kangaroo can bound across level ground with each jump
carrying it 10 m from the takeoff point. Typically the kangaroo
leaves the ground at a 20° angle. If this is so:
a. What is its takeoff speed?
b. What is its maximum height above the ground?
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