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

question 1

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 $\mu$ _s. Block A is pulled with a horizonatal force. It begins to slide out from under B if the force is greater than:

• A) m_Ag
• B) m_Bg
• C) \(\mu\)_sm_Ag
• D) \(\mu\)_sm_Bg
• E) \(\mu\)_s ( m_A + m_B)g