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Chapter 4: Q.75 (page 109)
A painted tooth on a spinning gear has angular acceleration , where t is in s. Its initial angular velocity, at , is . What is the tooth鈥檚 angular velocity in rpm at ?
The tooth鈥檚 angular velocity is .
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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.
Peregrine falcons are known for their manoeuvring ability. In a BI0 tight circular turn, a falcon can attain a centripetal acceleration 1.5 times the free-fall acceleration. What is the radius of the turn if the falcon is flying at ?
You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. You find the arrow stuck in the ground 60 m away, making a 3.0掳 angle with the ground. How fast was the arrow shot?
37. II FIGURE EX4.37 shows the angular acceleration graph of a turntable that starts from rest. What is the turntable's angular velocity at (a) , (b) , and (c) ?
22. II Susan, driving north at , and Trent, driving east at , are approaching an intersection. What is Trent's speed relative to Susan's reference frame?
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