Physics, 28.06.2019 17:10 kayyjayy3106

The mass of a bicyclist and bike is 80 kg. the drag coefficient is 0.79. frontal area is 0.42 m^2. the density of air is 1.1 kg/m^3 at this elevation. the terminal velocity is reached when the drag force of a free falling object is equal to the weight.
a)estimate the magnitude of the terminal velocity of the cyclist after he has ridden his bike off of a cliff. assume that the frontal area remains constant during the fall.
b)estimate the terminal velocity of the cyclist coasting down an incline of 15 degrees. note that it is not the entire weight of the cyclist that is pulling him down the hill. assume no friction in the wheels.
c) what happens to the terminal velocity of the cyclist as his mass is increased?
d) what is the magnitude of the drag force when the cycling velocity is equal to the terminal velocity in part b?
e) how much negative work would the drag force in part d do during a 40 km ride?

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 00:30

In positive numbers less than 1, the zeros between the decimal point and non zero are significant

Answers: 2

Answer

Physics, 22.06.2019 05:10

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

Answers: 3

Answer

Physics, 22.06.2019 08:00

Hydrogen and helium are both members of?

Answers: 2

Answer

Physics, 22.06.2019 16:50

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

Answers: 2

Answer

You know the right answer?

The mass of a bicyclist and bike is 80 kg. the drag coefficient is 0.79. frontal area is 0.42 m^2. t...

Questions