A bicycle has a momentum of 36 kg • m/s and a velocity of 4 m/s. What is the mass of the bicycle?

Momentum is calculated with p = mv, where p is momentum, m is mass, and v is velocity. Rearrange to find mass: m = p ÷ v = 36 kg·m/s ÷ 4 m/s = 9 kg. The bicycle’s mass is 9 kg, choice A.

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