Engineering, 14.05.2021 04:50, 913003853
The resistance to motion of a good bicycle on smooth pavement is nearly all due to
aerodynamic drag. Assume that the total mass of rider and bike is M = 100 kg. The frontal area measured from a photograph is A = 0.46 m2. Experiments on a hill, where the road grade is 8 percent, show that terminal speed is Vt = 15 m/s. From these data, drag coefficient is estimated as CD = 1.2.
a) Verify this calculation of drag coefficient.
b) Estimate the distance needed for the bike and rider to decelerate from 15 to 10 m/s while coasting after reaching level road.
Answers: 2
Engineering, 04.07.2019 18:10, DestyHilBan1183
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Engineering, 04.07.2019 18:20, RiverH246
Air flows over a heated plate àt a velocity of 50m/s. the local skin factor coefficient at a point on a plate is 0.004. estimate the local heat transfer coefficient at this point. the following property data for air are given: density = 0.88kg/m3 , viscosity 2.286 x 10 ^-5 kgm/s , k = 0.035w/mk ,cp = 1.001kj/kgk. use colburn reynolds analogy.
Answers: 1
The resistance to motion of a good bicycle on smooth pavement is nearly all due to
aerodynamic drag...
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