This picture from an old magazine shows an entrepreneurial young man, named Chet

Question

This picture from an old magazine shows an entrepreneurial young man, named Chet, who travelled across the country towing a miniature camper. Use this information: v_Avg = 9.00 m/s, Chet's average cruising speed when he's riding his bike. P_Avg = 210. W. Chet's average power exertion rate P_max = 850. W, Chet's maximum power exertion rate m = 180. kg. the mass of Chet, his bike, and his camper What is the average force (including friction, air-resistance. etc.) that Chet must push against (At his cruising speed.) F_Avg = When peddling at maximum power, how much time will it take for Chet to increase his speed from zero to his cruising speed (v_Avg) t =

Explanation / Answer

(A) We know that

Power = Force * Velocity

So, Force = Power/Velocity = 210/9 = 23.33 N

(B) Force = Power/velocity = 850/9 = 94.44 N

Force = Mass * accerlation

Accerlation = Force/Mass = 0.525 m/s^2

we know

v(avg) = u + at

9 = 0 + 0.525 * t

t = 9/0.525 = 17.143 seconds

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