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anonymous
 one year ago
A block of mass m is at rest on a 20° slope. The coefficient of static friction between the box and the floor is 0.64. The block is connected by a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. What is the minimum mass m that will stick to the surface and not rise up the slope?
anonymous
 one year ago
A block of mass m is at rest on a 20° slope. The coefficient of static friction between the box and the floor is 0.64. The block is connected by a massless string over a massless, frictionless pulley to a hanging block of mass 2.0 kg. What is the minimum mass m that will stick to the surface and not rise up the slope?

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zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2as always draw your Full Body Diagram out. then label the forces acting on each object.

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2dw:1444245859571:dw

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2for m2 do this\[y:Tm_2g=0\]\[y:T=m_2g\]then for the block on the incline\[y:nm_1gsin20=0\]\[y:n=m1gsin20\]and for x\[x:Tf=0\]\[x:T=f\]\[x:T=\mu n\]

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2\[m_2*g=\mu *m_1*g*\sin20\]put in your known values and solve for m1. i think this is how you do it.

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2\[m_2=\mu m_1\sin20\]

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2g could be divided out.

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2damn i forgot one force. hold on.

zephyr141
 one year ago
Best ResponseYou've already chosen the best response.2ok it should be this...\[m_1=\frac{m_2}{\mu \sin20+\cos20}\]
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