Question

A tandem (two-person) bicycle team must overcome a force of 34 lb to maintain a speed of 30 ft/s. Find the power required per rider, assuming they each contribute equally. Express your answer in horsepower.

Answer 1

I do not know these conversions but I can tell you how to do the problem..

Answer 2

Power = Force x velocity
Since, the power here is for two persons, divide the power by 2 to get individual power as it is said that they contribute equally....then convert your answer into horse power

Answer 3

okay thanks!! :)
can i ask one more question?

Answer 4

yea..post it

Answer 5

A pump is required to lift 200 L of water per minute from a wall 10 m deep and eject it with a speed of 20 m/s. (a) How much work is done per minute in lifting the water? (b) How much in giving it kinetic energy? (c) What horsepower engine is needed if it is 80% efficient?

Answer 6

density of water is 1 g/ml
Mass of water(in grams) = Volume of water(in ml) x 1(density)
a) work done = mgh
m : mass of water
g : acceleration due to gravity = 9.8 m/s^2 or 10 m/s^2
h : height or depth = 10 m
b) kinetic energy = (1/2)mv^2
m : mass of water
v : velocity of ejection = 20 m/s
c) If the engine is 80% efficient, then 80% of its capacity should equal to the work obtained in part a.
Let the engine's actual work be W
(80/100) x W = work calculated in part a.