Question: the spring constant k = 6 0 0 n / m the masses ma = 1 5 kg and mb = 2 0 kg ,

the spring constant k=600 n/m the masses ma=15kg and mb=20 kg, the horizontal bar is smooth, at the instant shown, the mass B is moving downwards at 1 m/s. How fast is B moving when it has moved downward 0.25 m from its present position the natural lenght of the spring is 20 cm
the spring constant k = 6 0 0 n / m the masses ma

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