Fick_class22_S11

# The collision the impulse imparted to the ball during

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Unformatted text preview: * (B) 2.40 N·s (C) 2.42 N·s Impulse approximation tf tf m = 0.200 kg t 10.0 ms J y = ∫ Fy dt = ∫ ( Ffloor on ball − mg ) dt ti 09/12/13 small ti = 1 (10 × 10−3 )(480) − 0.200(9.80)(10 × 10 −3 ) 2 14 PQ5a: A happy ball bounces nicely when dropped, whereas a sad ball makes little, if any, bounce. The balls have the same mass and each is tied, in turn, to a rope suspended from the ceiling. Each ball is pulled back from the vertical and released at a common height above the ground. Which ball is more effective at knocking more over the upright beam? over (A) happy ball (B) sad ball (C) The balls are equally effective. 09/12/13 15 Thinking Critically Thinking The balls have the same momentum prior to colliding with the beam. Which ball has the greater momentum after the collision? ie which bounces better? Which ball experiences the greater impulse during the collision? From Newton’s 3rd law, the impulse the beam exerts on a ball is equal in magnitude but opposite in direction to the impulse a ball exerts on the beam. Which ball exerts the greater impulse on the beam? 09/12/13 16 PQ5b: A happy ball bounces nicely when dropped, whereas a sad ball makes little, if any, bounce. The balls have the same mass and each is tied, in turn, to a rope suspended from the ceiling. Each ball is pulled back from the vertical and released at a common height above the ground. Which ball is more effective at knocking over the upright beam? more * (A) happy ball (B) sad ball (C) The balls are equally effective. 09/12/13 17 Reminders Reminders Tuesday: MasteringPhysics HW # 10 09/12/13 18...
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