A particle is projected vertically upward in a constant gravitational field with an initial speed Vo. There is a retarding force proportional to the instantaneous speed. Calculate the time it takes to come back to the initial position.

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A: given that  mass of block = M radius of path = R friction force f=bθ2/3

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Q: A 210-kg object and a 510-kg object are separated by 4.80 m. (a) Find the magnitude of the net…

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A: m1 = m2 = 1 kg side of equilateral triangle (d) = 1 m

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