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Chap 6 - 2,8,15,16

Chap 6 - 2,8,15,16 - 6.2 6.3 Assume the initial direction...

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Unformatted text preview: 6.2 6.3 Assume the initial direction of the bail in the -—x direction, away from the net. (a) Inpulsa_=Ap=m(o}—vi]t(0.0600 kg)[4o.o m/s-(—50.C mm] giving Impidse = 5.40 kg -'ni/s = toward the net. 03) ,I Work 2 AXE = -:-m(vf. 41,?) _ 40.0609 kg)[(40.0 wet—(50.0 iii/sf] =-27.0I ' 2 .I The speed just before impact is given by (103+ PEXL =(KE+PEX) as $- iw+0=o+mghor 0W = Zghi Taking dowfiward as positive, the imptflse—mOmentum theorem gives the average force as Choose the positive direction to be from the pitcher toward home plate. (a) Inpuiseefrw)=Ap=m(vf—p£]=(o.15_kg)[(—22 m/s)—(20.m/s)] C Impidse=F(At)=—6.3 kg-m/s, or 6.3 kgom/s toward the pitcher e _ rents-e = 46-3 ks—m/s heme N, (b) " At 2.[}>r:10'a s or 1? .—§ 3.2x 103 N toward the pitcher ...
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