- #1
Hafid Iqbal
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http://img849.imageshack.us/img849/9697/physicsy.jpg [Broken]
The system bodies shown in the figure is released from rest. Assuming all the contacts to be smooth, find the acceleration of each block (mA = 14 kg, mB = 11 kg, mC = 50 kg)
This problem from Problems In Physics by Abhay K. Singh
I really confused about the answer, it said the acceleration in y-axis for B is [tex]a_{By}=-3a_{Ay}[/tex] which acceleration of each block is [tex]a_A = \sqrt{2}, \ a_B = \sqrt{10}, \ a_C = 1[/tex]
I have tried to figure it out and still find [tex]a_{By}=-2a_{Ay}[/tex] and all of my answer didn't match with the answer by the author
I have had :
[tex]a_{Ay}=\frac{(2m_B-m_a)g}{4m_B+m_a}[/tex],
[tex]a_{By}=\frac{(4m_B-2m_a)g}{4m_B+m_a}[/tex],
[tex]a_{C} = \frac{3m_A.m_B.g}{(4m_B+m_A)(m_C+m_B)}[/tex]
One more thing, is it true that normal force for [tex]A[/tex] is zero?
The system bodies shown in the figure is released from rest. Assuming all the contacts to be smooth, find the acceleration of each block (mA = 14 kg, mB = 11 kg, mC = 50 kg)
This problem from Problems In Physics by Abhay K. Singh
I really confused about the answer, it said the acceleration in y-axis for B is [tex]a_{By}=-3a_{Ay}[/tex] which acceleration of each block is [tex]a_A = \sqrt{2}, \ a_B = \sqrt{10}, \ a_C = 1[/tex]
I have tried to figure it out and still find [tex]a_{By}=-2a_{Ay}[/tex] and all of my answer didn't match with the answer by the author
I have had :
[tex]a_{Ay}=\frac{(2m_B-m_a)g}{4m_B+m_a}[/tex],
[tex]a_{By}=\frac{(4m_B-2m_a)g}{4m_B+m_a}[/tex],
[tex]a_{C} = \frac{3m_A.m_B.g}{(4m_B+m_A)(m_C+m_B)}[/tex]
One more thing, is it true that normal force for [tex]A[/tex] is zero?
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