ti Coure: Purs 101 introduct ad Wite wieyPU XG ynics question I cheg.co+ Cutnell
ID: 1791035 • Letter: T
Question
ti Coure: Purs 101 introduct ad Wite wieyPU XG ynics question I cheg.co+ Cutnell, Physics, 10e Heir Chapter 07, Problem X10 Your ansmer is partisly correct. Try sgain mass is throw a c f th. a on, para u to . ground a d in thù terward direction, thù wagar, is bro ght to a halt. If thù diraction in h ch is maas is thro is actly fùveraad, but th. ied of this mass rulative to the A ago coastin at a speed va ale a strai ht W w road whkn 3.9% of th" a on wagon remo ns the 5ame. the wagon accelerates to ne 5peed ve. Calcul te the ratio va/A Mass threwa forwad drown backward tolerance +/-2%Explanation / Answer
speed of wagon = va
mass of wagon = m
final mass of wagon = 76.1m/100 = 0.761m
speed at which 0.39m is thrown = vm
hence initial momentum of the system = va*m
final momentum of the system = 0.39m*vm
from conservation of momentum
0.39vm = va .. (1)
for the opposite direction
va*m = vg*0.761m - 0.39m*vm
va = vg*0.761 - 0.39*vm = vg*0.761 - va
2va = 0.761vg
vg/va = 2.62812
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