PH-1441

Friction and air resistance

Physics · Secondary 4 · Hard · Friction and air resistance

A 0.020 kg ball falls vertically through air and eventually reaches a constant speed of

6.0\,\text{m s}^{-1}

. Take

g = 10\,\text{N kg}^{-1}

. Calculate the magnitude of the air resistance acting on the ball when it is falling at this constant speed.

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