Because of the gravitational pull when we go up the gravity pulls u down
True because you cannot see the wind
Answer:
The electric power generated by the wind turbine is 1105.84 kWh
The amount of electric energy generated is 26540.17 kWh
The revenue generated per day is $2388.62
Explanation:
Consider a wind turbine with a blade
Span diameter of 100 m installed at a site
subjected to steady winds at 8 m/s
l.e wind speed v = 8 m/s
Span diameter d = 100 m
A, sweap area = πd² / 4
= π x 100² / 4
= 7853.98 m²
Lets solve for wind speed v = 8 m/s
Density of Area ρ = 1.25 kg/m³
η = 44%
P = 1/2 ρAv³η
= 1/2 x 1.25 x 785.98 x 8³ x 44/100
= 1/2 x 1.25 x 7853.98 x 512 x 0.44
= 1105840.38
= 1.10584038 mw
= 1105.84038 kWh
= 1105.84 kWh
Energy generated by wind turbine per day
⇒ P x H
= 1105.84038 x 24
= 26540.16912 kwh
= 26540.17 kwh
Revenue generated per day = Energy x 0.09 kwh
= 26540.16912 x 0.09
= $2388.615
= $2388.62
As we know that sphere roll without slipping so there is no loss of energy in this case
so here we can say that total energy is conserved
Initial Kinetic energy + initial potential energy = final kinetic energy + final potential energy
as we know that ball start from rest
height of the ball initially is given as
also we know that
also for pure rolling
also we know that
now plug in all data in above equation
So speed at the bottom of the inclined plane will be 29 rad/s
