-
Anonymous users2024-02-07Physical Quantity Calculation Formula Remarks.
Speed = s t 1m s = km h
Speed of sound = 340m s
The speed of light c = 3 108 m s
Density = m v 1 g c m3 = 103 kg m3
The resultant force f = f1 - f2
f = f1 + f2 f1 and f2 are on the same straight line and in opposite directions.
F1 and F2 are on the same straight line and in the same direction.
Pressure p = f s
p = g h p = f s is suitable for solids, liquids and gases.
p = g h for vertical solid columns.
p = g h can be used to calculate the liquid pressure directly.
1 standard atmospheric pressure = 76 cmHg column = pa = m water column.
Buoyancy fbuoyancy = g f
Floating, levitating: f float = g
F float = g row = liquid g v row.
Judge the amount of buoyancy according to the floating and sinking conditions (1) Judge whether the object is buoyant.
2) Judge the object according to the floating and sinking conditions of the object.
In what state.
3) Find a suitable formula to calculate buoyancy.
Object float and sink conditions (premise: the object is submerged in a liquid and subject only to buoyancy and gravity):
f float g (liquid) floats to float f float = g (liquid = matter) suspension.
f float g (liquid) sinks.
Leverage Equilibrium Condition f1 l1 = f2 l 2 Leverage equilibrium condition is also called the leverage principle.
Pulley block f = g n
f = (g motion + g matter) n
sf = n sg ideal block of pulleys.
Ignore friction between axles.
n: the number of rope strands acting on the movable pulley.
Work w = f s = p t 1j = 1n m = 1w s
Power p = w t = f 1kw = 103 w, 1mw = 103kw
Useful work w useful = g h (vertical lift) = f s (horizontal movement) = w total w amount = w total.
Extra work w = w total w has = g motion h (ignoring friction between axles) = f l (inclined plane).
Total work w total = w useful + w amount = f s = w useful
Mechanical efficiency = wuseful wtotal.
g /（n f）
g-object (g-thing + g-motion) definition.
Do you want all the formulas for physics that are suitable for movable pulleys and pulley sets?
u/r=i
m is milli, i.e. 1 1000 >>>More
The full formula of junior high school physics can be referred to below. >>>More
In the high school range p= gh is applicable to the calculation of all liquid pressures!! >>>More
a2-b2=(a+b)(a-b) a3+b3=(a+b)(a2-ab+b2) a3-b3=(a-b(a2+ab+b2) >>>More
You look at the encyclopedia and the library, which has it.