Imagine a cyclist coasting down a 5.0◦ incline at a constant speed of 6.0 km/h because...
Imagine a cyclist coasting down a 5.0◦ incline at a constant speed of 6.0 km/h because of air resistance. If the total mass of the bicycle + cyclist is 50 kg, how much force must be generated to climb back up the incline at the same speed (and same air resistance)?
Homework Answers
the downward velocity is constant, so net acceleration must be zero
hence the air drag must be equal to gravitational force downward along the ramp
Fa = mg sin x
now for upward motion
Fnet = mg sin x + air drag
Fnet = 2 mg sin x = 2* 50* 9.8* sin 50
F net = 758.72 N
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