Hi, I followed the steps to question number 40 on chapter 3 whichsays \"Suppose

Question

Hi, I followed the steps to question number 40 on chapter 3 whichsays "Suppose a Chinook salmon needs to jump a waterfall thatis 1.45 m high. If the fishstarts from a distance 1.12 mfrom the base of the ledge over which the waterfall flows, findthe x- and y-components of the initialvelocity the salmon would need to just reach the ledge at the topof its trajectory." My numbers are slightly different then thetextbooks, but when I worked out the problem my answers were wrong.I got Vox=2.499 and Voy=2.127. How can I properly answer thisquestion? I followed the steps to question number 40 on chapter 3 whichsays "Suppose a Chinook salmon needs to jump a waterfall thatis 1.45 m high. If the fishstarts from a distance 1.12 mfrom the base of the ledge over which the waterfall flows, findthe x- and y-components of the initialvelocity the salmon would need to just reach the ledge at the topof its trajectory." My numbers are slightly different then thetextbooks, but when I worked out the problem my answers were wrong.I got Vox=2.499 and Voy=2.127. How can I properly answer thisquestion?

Explanation / Answer

let initial velocity=u initial vertical velocity=ux vertical acceleration=g=9.8 vertical displacement=1.45 v2=u2-2*g*h 0=ux2-2*9.8*1.45 ux=5.33 m/s time taken to reach max height=t v=u-g*t 0=5.33-9.8*t t=0.54 s initial horizontal velocity=vy horizontal acceleration=0 horizontal displacement=1.12 1.12=uy*0.54 uy=2.07 m/s

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