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M1 and M2 are two masses connected as shown. The pulley is light and frictionless. Find...

M1 and M2 are two masses connected as shown.
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The pulley is light and frictionless. Find the mass M1, given that M2 (7.00 kg) is moving downwards and accelerates downwards at 2.27 m/s2, that θ is 15.0°, and that μk is 0.320.

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At Mi 0 15 52-11 = M, 536

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