The Physics of the Fall of the T Piece of Paper I m in a hurry The physics master fast forwards T T

Gyrocopter principle. This game has no effect when played indoors.,Requires a crosswind.。。。 What grade are you?,The teacher actually came up with this kind of question.。。。

You'd better fold a piece of paper and demonstrate it in your hand. First of all, the piece of paper is Y-shaped... The two sides of the folded flat are equivalent to the "rotors", and when viewed from above, the extension wires of the two wings are staggered from the axis, so the fins are relatively inclined when they fall, creating a rotating force couple, which causes the paper to rotate and remain roughly upright.

At this time, there is a crosswind acting on the paper, the paper is slightly tilted, and then it is found that the radial inclination angle of the two wings of the paper is one large and one small, or even one n and one 0, at this time, the horizontal wing is affected by the crosswind resistance is small, and the other side is affected by the wind resistance, which produces torque to accelerate the rotation of the paper, produce lift, offset a part of the falling gravity, and make the descent slow down or even fly higher... It's normal if you don't understand, just go through the *** rotor structure reading and the principle of gyrocopter flight. These are just my experiences, and your teacher's answers may be different from mine, so don't contradict them.

It can be simply perfunctory as "the wind blows the paper and tilts, and produces a part of the upward component force on the rotor".

Is it made like a bamboo dragonfly?

This is not only related to the height, but also related to the angle of the two blades made horizontally by t, that is, the air resistance is different.

I can't help it, I have to learn it myself.

(1) The experimental principle of measuring the falling velocity of the paper piece is the velocity formula v=st;

2) According to the experimental principle, in order to measure the speed of the falling paper, it is necessary to measure the distance and time of the falling of the paper;

3) The distance of the falling paper needs to be measured with a scale, and the time of falling the paper needs to be measured by the stop meter;

4) The falling time of the paper is short, because the height of the paper from the ground is low, so if you want to make the falling time of the paper longer, you can increase the height of the falling of the paper; The paper piece flutters when it falls, because the area of the paper piece is large and is greatly affected by air resistance, so if you want the paper to fall in a straight line as much as possible, you can stack the two ends of the paper piece upward

So the answer is (1)v=st;

2) the time when the paper piece falls;

3) stop the meter; 4) Increase the height of the falling paper piece; Fold the ends of the paper upwards and fold them partially

The editor will come to dao to uncover for everyone, which often happens around you, 3 confusing physical problems, the first one asks what Coke is shaken violently, and when it is opened, it will spray a very strong water column, the second is the necklace collar, and the third is the solubility of salt.

Pressure p = pressure f

Divided by the force area S, so when the weight of the schoolbag is constant, the greater the force area, the smaller the pressure, and the area of the strap is larger than the place where the hand carries, so the local force on the back feels light, but it can not save effort. And the wider the strap, the lighter it feels.

The physical quantities to be measured in this experiment are: the height of the falling paper and the time of the falling of the paper disc;

Records ** are as follows:

Frequency. Height (m).

Time (s) Speed (m s).

。。。I'll be so depressed if my students do the same in the future.

Doesn't the teacher give a review?。。

I mean, you're a strange question. In my opinion, the most important thing in the first year of high school is the analysis of force, the connection between force and motion, and the connection between function and energy. Once these three points are figured out, everything is easy to do.

Whether it is the Shanghai Science and Technology Edition of the new science standard or the old course standard of the people's education version of the textbook, the physics knowledge network of the first year of high school has not changed much, the first semester of the first year of high school: the most important force analysis followed by Newton's second law Kinematics It is enough to remember the five major formulas These are inconvenient to summarize now and may not be comprehensive If your next short-term summary is not possible, it is recommended to buy this formula manual Mathematics, physics and chemistry are both available and relatively comprehensive. Finally, a little reminder in terms of learning, remembering the formula is only the most basic thing, just like the skeleton of a person, you have to do more questions by yourself, understand the questions, and slowly you will realize the mystery!

Don't insist! - A physics teacher.

Sliding friction.

Decomposition of forces (it is not possible to synthesize them).

Newton's second law.

What is 94 in the high school entrance examination, the eldest brother also has a full score in mathematics and physics.

What is force, what is force, the concept of force.

Force analysis. Synthesis and decomposition of kinematic forces.

Cattle are the same, two laws, three laws.

1. In all life, we often see the movement of objects falling from a height, such as holding a small ball and a piece of paper in your hand, and releasing the ball and the piece of paper from the same height at the same time, we see that the ball falls first, and the piece of paper falls to the ground later. If an American astronaut lands on the moon and releases both hammers and feathers from the same height, they can be seen to fall to the surface of the moon at the same time.

1.The main reason why the paper falls slower than the iron ball

2.It is possible to conclude that it is

1.the size of the surface area because the air has resistance.

2.In air, the speed at which an object falls is related to the mass and surface area of the object.

1.the size of the surface area because the air has resistance.

2.In air, the speed at which an object falls is related to the mass and surface area of the object.

1. Air resistance.

2. In a vacuum, objects fall at the same height and at the same speed.