To solve this problem we will apply the concepts related to the Doppler Effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other.
Mathematically it can be described as
Where,
v = Speed of sound
f' = Reflected frequency
f = Emitted Frequency
= Speed of the object
Assuming that the speed of the medium is the speed of sound of 343m / s, we will then have that:
True because the atmosphere is in the way
At the top, N + mg = ma
0.28mg + mg = ma
0.28g + g = V^2/r
V = ( 1.28 x 9.8 x 18 )^1/2 = 15m/s
Mass of James = 54.431kg
Distance ran by James = 3.6576m
Mass of John= 41.277kg
Distance relan by John= 3.6576m
Work done by James = 54.431kg*10N/kg*3.6576m= 1990.87J
Work done by John= 41.277kg*10N/kg*3.6576m=1509.75J
Horsepower = work done / time since time is same, James has larger horsepower
What..can you make it more clearer so I can understand and help you..