How many forces does an object bear when it is placed on an inclined plane? I wrote about gravity, support force and static friction force. I want to ask if I wrote more or less

1. When the object is in a static state on the inclined plane, it is subject to gravity, supporting force and static friction; 2. When the object is in a sliding state on the inclined plane, it is subject to gravity, supporting force and sliding friction; 3. If the object is spherical or cylindrical, it is rolling friction, but it rarely appears in junior high school; 4

Slope formula, to the meaning of physical quantities and expression

Principle of work: no machine can save work
FL=Gh
If there is friction on the inclined plane, the work WF will be done
FL=Wf+Gh

The problem of the static friction between the object and the inclined plane!
If an object is placed on an inclined plane, does the "static friction force between the object and the inclined plane" act on the object or the inclined plane? What is the direction?
In which direction are the static friction forces on the object and the inclined plane going?

Static friction of an object on an inclined plane: on the back is an inclined plane, which acts on the inclined plane
The direction is down the slope
Static friction of inclined plane: acting on the object, the direction is upward along the inclined plane

If one of the two equations x2 + (2-m2) x + 2m = 0 is larger than 1 and the other is smaller than 1, then the range of M is ⊙___ ．

Let f (x) = x2 + (2-m2) x + 2m, from the meaning of the question, the image should be so f (1) < 0, that is, 1 + 2-m2 + 2m < 0, then we can sort out m2-2m-3 > 0, and get m > 3 or m < - 1, so the answer is m > 3 or m < - 1

What's the quotient of the product of 6:5 3 and 2:3 minus 2:5 3 divided by 3:5 3

1 / 2

Make a cuboid wooden box with a board of 4cm in thickness. The cuboid wooden box is 50cm long and 30cm wide (height unknown). What is the cuboid volume?

How to calculate without height?
Volume of wooden box = length * width * height
Volume of wooden case = (50-4-4) * (30-4-4) * (height-4-4)

Preview of "Ansai waist drum" in Chinese Lesson 17 of junior middle school

Let the first n terms of the sequence {an} and Sn = n & # 178;.. {BN} be an equal ratio sequence of positive numbers and A1 = B1, A5 × B3 = 1
General term formula of ball 1 sequence {an} and {BN}
2. Let CN = an × BN to find the first n terms and TN of the sequence {CN}

When n = 1, A1 = S1 = 1n > = 2, an = SN-S (n-1) = n ^ 2 - (n-1) ^ 2 = 2N-1, so an = 2n-1a5 = 9b1 = A1 = 1a5 * B3 = 1, B3 = 1 / 9q ^ 2 = B3 / B1 = 1 / 9q = 1 / 3, so BN = b1q ^ (n-1) = (1 / 3) ^ (n-1) (2) CN = (2n-1) * (1 / 3) ^ (n-1) = 3 (2n-1) * (1 / 3) ^ NTN = 3 [1 * 1 / 3 + 3 * (1 / 3) ^ 2 +... + (2n-1) (...)

1. What's the result of multiplying one-third by three-quarters and subtracting one-fifth, and dividing the difference by three tenths?

(1/3*3/4-1/5)/(3/10)
=(1/4-1/5)*10/3
=1/20*10/3
=1/6

How many forces does an object bear when it is placed on an inclined plane? I wrote about gravity, support force and static friction force. I want to ask if I wrote more or less