W = FS w = GH = MGH w = FS unit of physical quantity

W = FS w = GH = MGH w = FS unit of physical quantity

W = FS, the work done is equal to the force multiplied by the distance
W = GH = MGH is only applicable to the work done by gravity, and the work done by gravity is obtained by multiplying the vertical moving distance
W = FS is generally used for work done by friction force, and the work done by friction force is obtained by multiplying the force distance
F generally refers to all forces
G is gravity
F is the friction force
S stress distance
H vertical movement distance

Where should the weight of moving pulley be added when considering the calculation of moving pulley weight
The object weighs 900N, three sections of rope are wound, and the moving pulley weighs 60N. Regardless of the rope weight and friction, is the vertical pull 320n or 360n or other?

When it is added to a heavy object, it can be understood that it is the same as the heavy object, and it is supported by the rope. After all, the movable pulley is just a medium for the heavy object to connect with the rope

G in GH divided by FS, is the moving pulley included in G?

No, it's all in an ideal state!

Finding the formula of physical electricity

Electrical formula of junior high school
Series circuit: current I (a) I = I1 = I2 = The current is equal everywhere
Series circuit: voltage U (V) u = U1 + U2 + The series circuit acts as a voltage divider
Series circuit: resistance R (Ω) r = R1 + R2 +
Parallel circuit: current I (a) I = I1 + I2 + The main current is equal to the sum of the branch currents (shunt)
Parallel circuit: voltage U (V) u = U1 = U2 =
Parallel circuit resistance R (Ω) r = 1 / R1 + 1 / r2 +
Ohm's law I = the current in a U / R circuit is proportional to the voltage and inversely proportional to the resistance
Current definition formula I = q / T Q: charge quantity (Coulomb) t: time (s)
Electric work w (J) w = uit = Pt U: voltage I: current T: time p: electric power
Electric power P = UI = I2R = U2 / r u: voltage I: current R: resistance
The relation of electromagnetic wave speed with wavelength and frequency C = λ ν C: the speed of light in vacuum

Finding the physical formula of electricity in the second grade of junior high school
Electricity, voltage, current, ohm, resistance, power, electricity and heat
The more, the better!
It looks like a formula, not to mention the square of I, u
thank you!

Calculation current: I = u / R, I = P / u
Calculation power: P = w / T, P = IU, P = R of square I, P = R of square U
Power calculation: w = the square of I, RT, w = (the square of U / R) * t
W=UIt
Calculation voltage: u = w / it u = P / I u = IR
Work w Joule (joule) J W = FS
Power P watt W P = w / T
Current I a (a) a i = u / R
Voltage U V U = IR
Resistance R ohm (Ω) r = u / I
Electric work w Joule (joule) J W = uit
Electric power P watt (watt) W P = w / T = UI
Heat Q Joule J Q = cm (T-T °)

[ninth grade physics] [electricity] [the formula for calculating electric power P is the scope of use]
When to use p = u & # 178 / R, when to use p = I & # 178; R?
P = I & # 178; R can be used in series circuit, P = u & # 178; R can be used in parallel circuit,

Basically, it's the same as yours. Because the series current is the same, and the parallel voltage is the same. There is a common value, which is more convenient to calculate. Of course, the reverse is OK. It's a little troublesome. Learning physics is to find the fastest and most convenient method, which is convenient to analyze problems

The formula of electricity in junior high school physics

(1) series circuit P (electric power) U (voltage) I (current) w (electric work) r (resistance) t (time) current is equal everywhere, I1 = I2 = I total (each branch current is equal everywhere and equal to the total current) total voltage is equal to the sum of the voltages at both ends of each consumer, u total = U1 + U2 (total voltage is equal to the sum of each branch voltage)

Junior high school must recite physics formula

The characteristics of series and parallel circuits (only take two resistors as an example) circuit diagram current voltage resistance voltage distribution or current shunt power series circuit formula: I = I1 = I2 expression: All currents in series circuit are equal formula: u = U1 + U2 & not; expression: Series electricity

What P = w / T and so on, all the physical formulas about electricity!

*: multiply /: Divide I * I: the square of I
IR=U I=U/R R=U/I
Series: u total = U1 + U2 + U3 + +UN (the total voltage in the series circuit is equal to the sum of the voltages of all consumers) I = I1 = I2 = I3 = =In (current in series circuit is equal everywhere)
Parallel: u total = U1 = U2 = U3 = =UN (the voltage of each branch of parallel circuit is equal to the total voltage)
I total = I1 + I2 + I3 + +In
W = uit = I * I * r * t (calculated heat energy of current conversion) = [(U * U) * t] / r = UQ
P=IU=I*I*R=（U*U）/R
There are not many formulas

Let's talk about all the formulas of physics and electricity in grade two

Series connection: I = I1 + I2 u = U1 = U2 r = R1 + R2 parallel connection: I = I1 = I2 u = U1 + U2 r = r1xr2 / R1 + R2 Ohm's law formula: I = u / R symbol meaning and unit: u --- voltage --- volt (V) r --- resistance --- ohm (Ω) I --- current --- ampere (a) electric power formula: P = w / T symbol meaning and unit: W ---