Why is the s in W Fs the height of the building and not the length of the staircase?

w=fs=(500+100) (7-1) 3=Of course, if the floor near the ground is not called the first floor, but the ground floor, then S is 21m, not 18m, which is a habit. ）

Work is equal to the product of the force and the distance that the force travels in the direction of the force. When people overcome gravity to do work, they naturally have to multiply the distance in the direction of gravity.

Actually, this is the difference between a scalar product and a vector product. Work is a scalar quantity, if written as a scalar formula, w=f·s=fscos [is the product of force f and distance s], scos = h, so that problem is equivalent to multiplying the height of the building, not the length of the staircase.

And vectors, such as moment m=fl, are written as vectors: m=f l=flsin [ is the product of force f and distance s]. If you still study physics in college, you just need to remember that "point multiplication is a scalar quantity, which is equal to the product of two numbers and multiplied by the cosine of the angle formed by the two numbers"; "The cross product is a vector, equal to the product of two numbers multiplied by the sine of the angle formed by the two numbers".

Like this. w=fs This is the formula.

But it can be written:

The first equation is generally used to calculate the work done by the tensile force, and s is the distance.

And the second equation is the general formula to calculate the work done by gravity, h is the height, just like in this problem.

So you need to use height, not length.

The so-called work is the accumulation of force over distance, so in the formula fs, when let is the distance in the direction of the force.

In this problem, the problem of going upstairs like an object is abstracted into a physical problem, which is actually that man overcomes gravity and does work, so the direction of the force exerted by man is exactly the opposite direction of the gravitational force on the object, i.e., vertically upward!

Then the distance s is the distance in the direction of the force.

It's the vertical height!

I'll give you some high school knowledge.

The so-called displacement refers to the straight-line distance, from the starting point to the end point, no work is done in the direction perpendicular to the force, so you only need to calculate the height of the building, no horizontal distance is required, or you can think of it as two sections, one horizontal and one vertical, and no work is done horizontally, so only the vertical distance is ......Hey.

1. The object is transported back horizontally, transported again, and finally returned to the starting point, so it does not work, but in the vertical position, it is fainted to the height of the building.

Because the definition of work is the product of the force experienced by the object and the displacement of the object under the action of the force, in the problem, the weight is lifted upward, and the upward displacement is produced under the action of the force, which should refer to the vertical distance, so it is the height of the building.

w=gh=100n×(3m×6)=1800w

That's why s in w=fs is the height of the building and not the length of the staircase. I don't know. But the upstairs said this, and thought it should be like this.

The stair railing is calculated according to the size shown in the figure, that is, the length of the staircase and the width of the stairwell! If you're on a budget, I'll remind you that the calculation rule for stairs is by area!

1. "Use the projection length coefficient on both sides of the number of layers + the number of ladder bending length + the top bending length" in which the bending length of the ladder well does not exist, here is the elbow, this length should not be calculated, it should be calculated for each bend two elbows! "Use the projection length coefficient on both sides of the number of layers + the number of steps + the number of top layer bending length" in which the steps bending length does not exist, here is the elbow, this length should not be calculated, it should be calculated for each bend two elbows!

2. If it refers to the calculation rules in the budget, it is very simple, calculated according to the actual extension meter of the handrail, if you want to apply the formula, it is the coefficient of the horizontal projection length multiplied by the handrail, and the value obtained is the budget engineering quantity of the railing. (The number of embedded parts does not need to be extracted in the budget, and it is included in the budget quota).

If you are referring to the amount of material in construction, then you also need to provide the specific method of the railing, the material, the height, the pattern and other data.

The embedded parts are generally buried in a step.

The railing is calculated based on the length of the handrail centerline, including the elbow length, according to the dimensions shown in the design drawing. You can use the Pythagorean theorem to calculate the length of the slope, then add the width of the stairwell, and add the width of the staircase on the top floor. Because for protection, the top layer should also be made of railings.

Extension meters are not marked in the impression either

Anyway, the two sides have their own hook three strands, four strings, five, a2+b2=c2

That is, the length of the staircase (b square + h square 2 + stepwell (b square + h square 2

With the Pythagorean theorem.

The square of the horizontal length plus the square of the vertical height gives the sum of the re-squared.

That is, the length of the reserved opening of the staircase, in addition to the length, there is also the width and floor height.

Length = width of each step multiplied by the number of steps.

Solution: In RT ABC, AC +BC = AB , so AC = AB -BC = 52-32 = 25-9 = 16 so AC = 4 (m).

So the carpet length is AC+BC=4+3=7 (meters).

It takes 7m. This needs to be imagined, and the stairs are all folded, both horizontal and vertical.

When the stair is straightened, its length is equal to the horizontal length plus the height. The Pythagorean definition shows that the horizontal length is 4m, and the height is 7m

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How to calculate the length of the stair slope and the power formula? Use the Pythagorean theorem to calculate. Formula: The length of the inclined plane = (square meters of height + square meters of horizontal length).

It seems that the planar projection is multiplied by. Also using the Pythagorean theorem! Hope to identify!!

The sum of the squares and the squares of the re-squared.

The length of the staircase is c = (a +b ).

Staircase quantity calculation:

Concrete volume (length square of the rung, height of the rung) open Width of the rung, thickness of the board, the same run, the number of stairs, the width of the rung, the height of the rung, 2 the width of the rung, the number of runs, the number of the same rung, the number of stairs.

Vertical projection area (run width, wall width), run length, number of same runs, number of stairs.

Stair roof area (run length 2 run height 2) power run width number of the same run number of stairs.

Wherein: flight length (refers to projection length) (number of steps 1) step width; Run height Number of steps Step height.