The concept and formula of free falling motion?

The concept and formula of free falling motion?

Free falling body motion 1. Initial velocity VO = 0.2. Final velocity VT = GT 3. Falling height h = GT2 / 2 (calculated from VO position downward) 4. Deduction vt2 = 2GH note: (1) free falling body motion is a uniformly accelerated linear motion with zero initial velocity and follows the law of uniformly variable speed linear motion; (2) a = g = 9

Velocity formula of physical free falling body

V=gt
V=√2gh

The meaning of free falling body formula in Physics

G is the acceleration of gravity
S = 1 / 2 (a * T ^ 2) {it's time for the teacher to teach}
Replacing a with G is the free falling body formula

How to explain the physical formula a = FS

W=FS
Work = force x distance
How much work does a force do is equal to the magnitude of the force multiplied by the distance the object moves in the direction of the force

Heat engine efficiency formula
Mechanical efficiency = w divided by Q total
What do you mean W is useful?
What does Q always mean?
What formula do you need to bring? What do these two w's and Q's bring? What do they represent respectively?

W useful: the mechanical energy provided by a heat engine, that is, the energy used to do work, is usually calculated by w = FS or w = Pt;
Q total: all the heat released by fuel combustion. It is usually calculated by q = MQ; m is the mass and Q is the calorific value;
Complete expression:
η = w yes / W total = FS / MQ
Or = Pt / MQ
In calculation, because the mechanical energy is less than the heat released, the efficiency is always less than 1

Calculation formula of heat engine efficiency
η = what

η = active work / total work * 100%
η is the efficiency of the engine

What do all the letters in the formula mean? N = w has Q_ Q = MQ_ P=W\T=FV_ W=FS=(GH)

N = mechanical efficiency
W = useful
Q release itself means that the heat released does the total work at this time
M = mass
Q = calorific value
P = power
W = work
T = time
F = tension
V = speed
S = distance
G = gravity
H = height
Mechanical efficiency = active work / total work (heat released)
Heat released = mass times calorific value
Power = total work / time = pull force times speed (this is derived from the previous formula)
Total work = pull force times distance = gravity times height

What is the formula for calculating the efficiency of a heat engine?

The heat engine efficiency is the ratio of the energy used to do useful work to the heat released by the complete combustion of the consumed fuel. The expression is: η = w useful / Q the factors that affect the heat engine efficiency are mainly the heat carried away by the exhaust gas, about 50%, and other factors such as friction, heat loss, incomplete fuel combustion, etc

Deformation of efficiency formula of heat engine
... heat engine efficiency n = w / Q * 100%
Well, under the deformation formula
I don't know much about self-study

Heat engine efficiency η = w / Q × 100%
The ratio of the part of energy (W) used to do useful work to the energy (q) released by complete combustion of fuel is expressed as a percentage

Physics elective course 3-1 Chapter 2 main formula of constant current
Chapter 1 main formula of electrostatic field

The current I = q / T; I = u / R; I = E / (R + R) or E = IR + IR can also be e = u inside + U outside;
Resistance R = ρ L / S; work w = uit; power P = UI
Joule heat q = i2rt; q = uit = i2rt = u2t / R
Total power P total = ie; output power P out = IU; output efficiency η = P out / P total