# hmwk2 - ◦ Ac-cording to the textbook which factor is more...

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Homework #2 Due midnight Sunday October 2. 1. In Fig. 3-6 of Hay, which ball has (a) the smallest speed? (b) the greatest launch angle θ ? (c) the largest horizontal component of the velocity? (d) the largest vertical component of the velocity? 2. The ﬁgures on the next page show vector diagrams of a swimmer moving with a current. The swimmer’s velocity is v s and the velocity of the current is v c . The net velocity of the swimmer v n is the vector sum of v s and v c . (a) Which diagram represents swimming downstream with the current? (b) Which diagram represents swimming upstream against the current? (c) One diagram represents swimming across the river. (The swimmer heads slightly upstream so she goes straight across from one shore to the other.) Which diagram shows this? 3. Why is the optimal launch angle in shot put slightly less than 45

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Unformatted text preview: ◦ ? Ac-cording to the textbook, which factor is more important than launch angle in determining the range of the shot put? Which ﬁgure supports this as-sertion? 4. What is a sport (besides basketball) where accuracy is the most important factor in selecting the optimal launch angle? Warmup Questions Submit answers by 11:00 p.m. Monday October 3. 1. Warmup question for October 4. In a sport with a goaltender such as ice hockey, why is a deﬂection often more eﬀective than a single hard slap shot? 2. Warmup question for October 6. In karate, how do you break a board without getting hurt? 1 v s v n v c v s v n v c v s v n v c v s v n v c (B) (A) (D) (C) 2...
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hmwk2 - ◦ Ac-cording to the textbook which factor is more...

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