Block A, with Mass M_A, Is Initially at Rest on a Horizontal

question 2

Multiple Choice

Block A, with mass m_A, is initially at rest on a horizontal floor.Block B, with mass m_B, is initially at rest on the horizontal top surface of A.The coefficient of static friction between the two blocks is $\mu$ $\mu$ _s.Block A is pulled with a horizontal force.It begins to slide out from under B if the force is greater than:

• A)"m_Ag"
• B)"m_Bg"
• C)"m_Ag"
• D)"m_Bg"
• E)" ( m_A + m_B)g"

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