estimate the force that a cyclist travelling at 6m/s needs to apply to the brakes to bring the bicycle to a stop in a distance of 15m. Ignore air resistance & friction.

Question

Physics

Hugo Lambert

16 September, 15:31

estimate the force that a cyclist travelling at 6m/s needs to apply to the brakes to bring the bicycle to a stop in a distance of 15m. Ignore air resistance & friction.

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Rayne Martinez · Answer 1

v1 = 6m/s

v2 = 0

∆v = v1 - v2 = 6m/s

s = t * v = 15m

t = s/v1 = 15 (m) / 6 (m/s) = 2.5s

a = ∆v/t = 6 (m/s) / 2.5s = 2.4m/s2

a = F/m = 2.4m/s2

F = a * m = 2.4m/s2 * ? kg

I can't tell you this because I don't know the mass of this cyclist