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4. (8 pts) A clever Physics 2A student wants to determine the mass of the dynamical cart on her table without using a scale.

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solution: 1 M₂ = 0.50kg v;=0, Uf = 2.0ms, t=45. Uf=vitat =D 2.0 = axu => a=0.5m/s2 Mag-T=Mza T= mia Wyg M, + M2 mi M m2 M, -

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