ca Sapling Learning the eavy sled is being pulled by two people as shown in the
ID: 1546517 • Letter: C
Question
ca Sapling Learning the eavy sled is being pulled by two people as shown in the figure. The coefficient of static friction between sled and the ground is 0.611, and the kinetic friction coefficient is Ak -0.443. The combined mass of the sled and its load is kg. ropes are separated by an 28e, and they an angle 31.4" with the horizonta both ropes pull equally hard, what is the minimum rope tension required to get the sled moving? Number f this rope tension is maintained after the moving, what is the sled's acceleration? NumberExplanation / Answer
a)
from newtons law
2T cos 31.4+ 2T cos(28/2) -f = 0
2T cos 31.4+ 2T cos 14=us ( mg - 2T cos 31.4)
3.6476T = (0.611) ( 366 x 9.8 - 1.7071 T)
T = 467.7 N
b)
from newtons law
2T cos 31.4+ 2T cos 14-f = ma
2T cos 31.4+ 2T cos 14. -uk ( mg - 2T cos 31.4) = ma
798.4+907.6- (0.443) ( 366*9.8 -798.4) = 366* a
a=1.286 m/s2
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