For the project draw a labeled diagram of water reservoir, that is hydroelectric power station, where water comes through different water sources like precipitation, and through rivers get collected in dams( water reservoirs), from here water falls on turbines and rotate them, by rotation of turbine energy is produced, and than finally this energy through transformers gets converted into electricity.
In this example you have all types of energy that is required to complete your project.
For example when water is running in rivers , it has kinetic energy, when gets collected in dam( reservoir) ,it has potential energy, when falls on turbines it gets converted into mechanical energy, and finally through transformers gets transformed into electricity, that is electric energy.
so it's all about the law of energy conservation.
Answer:
a)Vg=13.42m/s :Speed with which the ball hits the ground
b) t₁= 2.74s : Time the ball remains in the air
c)h=9.19m: Maximum height reached by the ball
Explanation:
We apply the kinematic equations of parabolic motion:
a) Vg= Vo
Vg:speed with which the ball hits the ground
Vo: initial speed
Initial Speed Calculation
![v_{o} =\sqrt{v_{ox}^{2} +v_{oy} ^{2} }](https://tex.z-dn.net/?f=v_%7Bo%7D%20%3D%5Csqrt%7Bv_%7Box%7D%5E%7B2%7D%20%2Bv_%7Boy%7D%20%5E%7B2%7D%20%20%7D)
![v_{o} =\sqrt{16^{2} +12^{2} }](https://tex.z-dn.net/?f=v_%7Bo%7D%20%3D%5Csqrt%7B16%5E%7B2%7D%20%2B12%5E%7B2%7D%20%20%7D)
Vo=13.42m/s
Vg=13.42m/s
b)Calculation of the time the ball remains in the air
t₁=2*t₂
t₁;time the ball remains in the air
t₂ time when the ball reaches the maximum height
Vf=Vo-g*t₂ : When the ball reaches the maximum height Vf = 0
0=13.42-9.8*t₂
9.8*t₂=13.42
t₂=13.42 ÷9.8
t₂=1.37s
t₁=2*1.37s
t₁= 2.74s
c)Calculation of the maximum height reached by the ball
When the ball reaches the maximum height Vf = 0
Vf²=V₀²-2*g*h
0= V₀²-2*g*h
2*g*h= V₀²
h= V₀² ÷ 2*g
h= 13.42² ÷2*9.8
h=9.19m
1. turn off lights in classrooms when not in use.
2. turn off all computers when not in use.
3.use a small amount of water when washing your hands.
4. Don't charge your cell phones during class.
5. open windows instead of using air conditioner