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Introductory Physics Homework Help
Frictionless Incline Problem
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[QUOTE="NoobeAtPhysics, post: 4525663, member: 490009"] [h2]Homework Statement [/h2] M1 and M2 are two masses connected as shown. The pulley and the incline are frictionless. Find the mass M1, given that M2 (4.00 kg) accelerates downwards at 3.53 m/s2, and that θ = 32.0°. [ATTACH=full]164417[/ATTACH] [h2]Homework Equations[/h2] F = m*a Fk = u*N [h2]The Attempt at a Solution[/h2] Forces on m1 Fy = T - N - m1*g*sin(theta) = m1*a Fx = N - m1*g*cos(theta) = 0 Forces on m2 Fy = m2*g*T = m2*a Using equations above, T = m2(g-a) N = m1*g*cos(theta) m2*(g-a) - m1*g*cos(theta)-m1*g*sin(theta) = m1*a rearranging for m1 m1 =[m2*(g-a)]/[a+g(sin(theta) + cos(theta))] Plugging in the correct values, I get 1.47kg for my answer which is... wrong :( Thank you, Noobe [/QUOTE]
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Frictionless Incline Problem
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