(b)(c)so 3.45. Set Up:For the motion of the football take upward. and Use the ycomponent motion to find the time thefootball is in the air. This same time applies to the horizontal motion.Solve:When the ball returns to the ground,gives and Then In the 1.57 s that the ball is in the air the secondplayer must travel Therefore, his (constant) velocity must be3.46. Set Up:Take downward. For the dart and for the monkey,and For the dart,and The dart must travel 90 m horizontally before the monkey reaches the ground.Solve:monkey:with givesdart:gives3.47. Set Up:Take upward. Solve:Use the vertical motion to find the time in the air:with givesThe quadratic formula givesThe positive solution is During this time she travels a horizontal distance She will land 55.5 m south of the point where she drops from the helicopter.3.48. Set Up:Take downward. Solve:Use the vertical motion to find the time in the air:with gives Then 3.49. Set Up:Use coordinates with upward and horizontal. The bale has and and Solve:
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