Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ END OF - - CHAPTER PROBLEM SOLUTIONS Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ Contents Contents 1 Chapter Problems Chapter Problems 22 Chapter Problems 45 Chapter Problems 68 Chapter Problems 86 Chapter Problems 112 Chapter Problems 130 Chapter Problems 151 Chapter Problems 163 10 Chapter 10 Problems 192 Full Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education filewithout at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ Chapter Chapter Problems Full Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or without the prior written consent of McGraw-Hill Education file distribution at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS Express the following distances in meters, using scientific notation: (a) the length of a football field; (b) the distance of a marathon (26 miles + 384 yards); (c) a good basketball player’s vertical (40 inches) a) L b) La c) Full = 100yd 26.2mi 40in × ' ±£ # 3.28ft yd li6h!T 2;?,Yữ = ì i 91.5 1,00kƠ ,8otm= = = m 42 1.016 , 9.15×10 182 m ' m = 4.2ì10 m Copyright â 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education filewithout at https://TestbankDirect.eu/ 'm Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS Choose the slowest among the following speeds: 220 ft/s, 100 mph, 70 m/s, 300 km/hr, 70 yd/s must zzoftsl 100 mph 70 % 300 Full file put all = i4o4j7npMnI km/h - r - units same Ink 704% in 190kt 3¥ to numerically compare % 67.1 = , % 44.7 ' !x¥s krfstt = c- = slowest 83.3% 64% Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education atwithout https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS An excellent time for the 1500-m race is minutes 31.4 s Express this time in (a) minutes and (b) seconds At = = Full 90*+31.4 +31.4 s ' s = 211.4 {Mo÷ = s 3.52 Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education filewithout at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS Europeans often brag that they drive 100 – 100 km/hr, that is How fast is this, in (a) mph? (b) ft/s? a ) b) Full u= v= 100 knmrn 100¥ t.tn#m = 62.1 3,2M¥ Woof mph folks = 91.1 tY Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education filewithout at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS / A Express Terrelle Pryor’s weight (233 lb) in Newtons (See Appendix ?? for conversion factors.) W - 233lb ' ¥25,5 = 1036 N Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS Figure 1.1 shows a woman touching her toes a) Why does she instinctively angle her legs backward away from vertical? b) Try, yourself, to touch your toes (or reach for them, anyway) with legs straight and vertical To make sure they remain vertical (i.e they don’t tilt backward like the woman’s), stand with your heels against a wall and then bend over Your body and instinct will teach you this important point more convincingly than will any book c) In January, 2008, the New York Times ran a story about UNCAsheville’s basketball player Kenny George, 70 700 tall (!!!) Asheville has a contract with Nike, who made 12 pairs of size-26 shoes for George The formula for American men’s shoe size is Size = ⇥ length in inches 24 If the woman in the figure had Kenny George’s feet, would she be able to maintain her balance if she did nt angle her legs backward, but kept them vertical? estimate ofem instance shown - * t • - • Figure 1.1: Problem her Full M location legs Frith ofcm estimate were if her vertical another fool foot Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education filewithout at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ a) As she bends the top of in the photo ) , left b) C) Go size to , must she keep her 24 => cm extend above las feet the to mass some her seen ahead ! = 3.1 =) - his feet Estimating from could the ) inches twice photo maintain C it's siZ}+24_ = 16.7 were ~~ Full right body to the her long ! inches as long as reasonable , balance with 265242=16.7 = legs to an woman average say " " vertically yes she oriented Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education file at https://TestbankDirect.eu/ 's Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS (a) In horsepower, what is the power expended by a 65-W lightbulb? (See Appendix ?? A for conversion factors.) (b) How many 65-W lightbulbs does it take, to expend as much power as a 0.5-hp lawnmower? a) p b) - 65W Roger feh÷w - 0.5 × # hp hp 0.087 = i T4f÷ 650=373 bulbs N= = 373 = TV 8.7 10.2 hp W W 3,753¥ = 5.7 light bulbs Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS In physics, Hooke’s Law describes the force F exerted by a spring when it is stretched a distance x Force is measured in Newtons (N) and distance in meters (m) For some spring with “spring constant” k = 10 N/m, which of the following formulae are definitely wrong, based solely on units considerations? (a) F = kx (b) F = kx (c) F = x/k (d) F = x2 /k (e) F = kx/2 (f) p F = kx2 /2 (g) F = k x IF ] a) b) c) d) e) F= [ N = 0k kx F=¥ ok ? C @ a ok ? ' ÷ " ok ? g) Full F=k5x Fm ok ? does Ym would this yes m m2 ì N X hfữ ?_ Fn NE not affect definitely definitely No wrong X - m would yes this NO definitely work units ! F=kI f) Nt F- NO wrong NE the : - work Nt Nf E ¥ [ k] m - Ni ? ok ? F= ] ok ? F=kx2 F= x m2 NEIMTM ì wrong X No Copyright â 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education file at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 10 As we discuss in the next chapter, the acceleration of a runner is measured in ft/sec2 Below are some formulae for the distance x the runner gets in some time t Based solely on units, which of them are definitely wrong? p (a) x = at (b) x = a t (c) x = a2 t (d) x = at2 (e) x = at2 /2 (f) x = a/t (g) x = a/t2 a) ×=a b) c) t it - at x= e) ft Ist ×= - ' TITS ¥ - ft X s ¥5 - d)ft ' fly - ft art X= × ft 's x = tƠ ì sz factor ftp.sz does effect f) g) tt.tt#=ttI ×=tt × - of ft - fts# =t± of 's not units X × Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the consent of McGraw-Hill Education Fullprior filewritten at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 11 10 What might be a reasonable estimate for the number of strides an Olympic athlete takes in the 100-m dash? stride Im ~ =) # # ( Full 1.5 - strides strides somewhere - = in m lPm± 1,99dm this = = 100 strides strides 66.7 range ) Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the at prior written consent of McGraw-Hill Education file https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 12 11 In the horizontal direction, about how far is the diver’s center of mass / from her feet, in figure ??? I : :# :X : : I Ơ Full N Copyright â 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education file at https://TestbankDirect.eu/ ft Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 13 12 a) In mph, how fast does the typical marathon runner run? b) In mph, what is the typical speed for a fastball pitch in the major leagues? c) About how far can a college track athlete run in one minute? a) professional ) good ( not a ' " ' typical say mi 26.2 Thr = u b) pitch MLB in ( this based is c) he say run can mile I -4.5mi We not have there up are with reasonable Full mph × yet many something answer minute range knowledge reasonable come : 0.15 mile 0.22 = estimate to range or , kinematics covered ways Trmo8YT9Fis mile 4:30 n hr whatever ) or a } previous on online found mph 6.6 = 80-95 : mph 8.7 = YIT - z ~ hr - time , but this and - 0.25 mile Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution the prior written consent of McGraw-Hill Education filewithout at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 14 13 How many American football fields (ignore the endzones), laid end-toend, make a mile? L = mile N = - N - ( yd ) 100 l,omoilynd 17604 = mile 17.6 T no units Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 15 14 Europeans always tell their height in centimeters in cm? Typical low high h ; : h= will answers 5ft = 6ft ' in 13.3¥ = 6.5ft be in range ¥ ' What is yours, 13.3¥ 152.4 = ¥ cm = 198cm Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without written consent of McGraw-Hill Education Full the fileprior at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 16 15 Estimate the number of times a basketball is dribbled (i.e hits the floor while being dribbled) during one 12-minute quarter of an NBA game Describe how you arrived at your estimate There several are answers Most student answer ball strikes dribbled bit belter , bounces # A =) yet : isn't ( also Full allow a je being passed I to a be => it , , as 920kƠ ì like more /sec once ~ dribbled shot held , low ( 's large acceptable zt as range : = 120 entire the is ) but , low , 360 - = 720 - 360 time only say actually ) estimate unreasonable - see # = every once 60 12 × time the not 12 is bounce = Ball =) the ground minx bounces sec # £ : bsae¥r = dribbled when : Better of variety a common when lead to which aspects could 120 760 Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without written consent of McGraw-Hill Education filetheatprior https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 17 16 In one variant of rugby (rugby union), when the ball goes out of bounds (“out of touch” in rugby terms), the ball is thrown in in what is known as a line-out This is more or less equivalent to a throw-in, in soccer In a line-out, teams can lift players into the air to help them intercept the ball (In rugby league, the other variant, line-outs are not used Instead, when the ball goes out of touch, a scrum– one of those giant huddlelooking things with both teams pushing against each other– is held near the spot that the ball left the field.) In figure 1.2, Leinster (blue uniforms) have captured the ball on a lineout a) Where is the center-of-mass of the three-person configuration b) The player on the left appears to be bearing most of the weight of his teammate If the player on the ground to the right would suddenly vanish, how would the center of mass of the remaining two (taken together) di↵er from that of the three-player combination? c) Again, if the player on the ground to the right would suddenly vanish, could the remaining two players maintain their pose without toppling over? (Strength is not the issue– assume the players are infinitely strong.) Explain your answer d) Now look at figure 1.3 Assume that the athletes are infinitely strong If the cheerleader on the right would suddenly vanish, could the remaining two maintain their pose without toppling over? Explain your answer a) am is below lifted player the ore * %h•k•_ Nd d approx of c photo see position lifters between next page on m PM 94 b) If the player on the players • bon midway ~ - d&\ $k approx of c the right would would move up position in Vanish , and the the to continued next em page left on Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution Full filewithout at https://TestbankDirect.eu/ the prior written consent of McGraw-Hill Education of Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS approx position of position of of group if Approx am , player is on - e- • right the 18 am of 2- player group so gone for 2- combo , player em is above not of base y support Figure 1.2: Problem 16 29 March 2014; Devin Toner, Leinster, and Paul O’Connell Munster, contest a lineout Celtic League 2013/14, Round 18, Leinster v Munster, Aviva Stadium, Lansdowne Road, Dublin Picture credit: Brendan Moran / SPORTSFILE c) even if the players the if left the center two INFINITELY were players could vanished right player of mass is NOI outside , te STRONG hold their stance because the system base of support Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without Full file at https://TestbankDirect.eu/ the prior written consent of McGraw-Hill Education Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS If the right would be absent, the on woman 19 the here c pbeapproximtly • base of support Figure 1.3: Problem 16 This point two pose D¥ cheerleaders even base of support, sit above the if were the very strong , they woman on the right so if the could walked remaining away Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ that hold Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 20 * 17 a) In figure ??, the drum major extends his hand with the baton as far forward as possible Is that important for his balance? b) Would this part of the routine be easier with a heavy baton, or a light one? c) Would this maneuver look more dramatic with his hat on (as shown) or o↵? (This is an opinion.) d) Would this maneuver be more difficult with his hat on or o↵? (This is not an opinion.) BATON a) yes extending mass possible as to extend his b) A allows him mass behind of support make heavy baton would it one c) , more base much as far forward as , - easier 's cm my opinion d) fact : to the : extend above it looks one 's base better hat makes it while body backward of with more keeping support the hat difficult on Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 21 18 Acceleration a is measured in m/s2 , and speed v in m/s If Z = v/a, then is Z a time, a distance, a speed, an acceleration, or something else? 2¥ YI - z ] = = Is = s z is a time Copyright © 2016 McGraw-Hill Education All rights reserved No reproduction or distribution without the prior written consent of McGraw-Hill Education Full file at https://TestbankDirect.eu/ ... https://TestbankDirect.eu/ Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS 11 10 What might be a reasonable estimate for the number of strides... filewithout at https://TestbankDirect.eu/ the prior written consent of McGraw-Hill Education of Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/... https://TestbankDirect.eu/ the prior written consent of McGraw-Hill Education Solution Manual for The Physics of Sports 1st Edition by Lisa Full file at https://TestbankDirect.eu/ CHAPTER CHAPTER PROBLEMS If the right