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Suppose the coefficient of kinetic firxxtion between mass a and a plane is .10 and mass A and B is 2.7kg. As Mass B moves down, determine the magnitude of mass A and B given an angle of 31 degrees. What is the smallest value of kinetic friction to keep the system from accelerating?
 2 years ago
 2 years ago
Suppose the coefficient of kinetic firxxtion between mass a and a plane is .10 and mass A and B is 2.7kg. As Mass B moves down, determine the magnitude of mass A and B given an angle of 31 degrees. What is the smallest value of kinetic friction to keep the system from accelerating?
 2 years ago
 2 years ago

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JerJasonBest ResponseYou've already chosen the best response.0
I've figured out wha the acceleration is (2.0m/s^2 \[(2.7kg)(9.80m/s^2)(1\sin31.10\cos31)/5.4kg=2.0m/s^2\]
 2 years ago

JerJasonBest ResponseYou've already chosen the best response.0
I also know the component forms of box A is Fy=22.68N and Fx=13.62N
 2 years ago

saliniBest ResponseYou've already chosen the best response.0
both boxes are in contact?
 2 years ago

JerJasonBest ResponseYou've already chosen the best response.0
Both boxes are connected to a string on a pulley, Box B is hanging from the pulley and box A is on an incline.
 2 years ago

saliniBest ResponseYou've already chosen the best response.0
u can draw the freebody diagram showing the forces acting on the box A and B?
 2 years ago

hoseinBest ResponseYou've already chosen the best response.0
fig isdw:1333223131753:dwso we have three equation:\[m _{B}gT=m_{B}a\]\[m_{A}gsin \theta\mu_{k}m_{A}gcos \theta=m_{A}a\]\[m_{A}+m_{B}=2.7\]so we can solve for mB & mA
 2 years ago

hoseinBest ResponseYou've already chosen the best response.0
for 2nd part i think : we get 2nd formula equal to 0 and solve for mu k
 2 years ago

JerJasonBest ResponseYou've already chosen the best response.0
^Sorry about the wait, but yeah it looks just like the image hosein drew
 2 years ago

hoseinBest ResponseYou've already chosen the best response.0
sorry i forgot this: theta oughtbe 60 degrees in formulas
 2 years ago
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