Formulas and theorems about elementary 2 physics

I just graduated from junior high school.

I scored 61 points in physics in the high school entrance examination. (out of 70).

I think things like math, physics, and chemistry are all about understanding memory.

There is no need to memorize formulas at all.

If you need it, I think it's all in the book.

We don't have physics in the second year of junior high school. The third year of junior high school is again.

The formula is summarized.

The formula is summarized as follows: Velocity: v=s t, density: =m v, gravity: g=mg, pressure: p=f s, liquid pressure: p= gh

Velocity: v=s t: In the unit of relay, physics often uses velocity to represent the motion of the object, the velocity mainly represents the speed and direction of the object's motion, and in terms of velocity, the motion displacement of the object is the ratio of the time used to occur this displacement, and the unit of velocity is meters per second, and the velocity represents a vector of the speed and direction of motion of a moving point at a certain moment.

Velocity is a physical quantity used to describe the speed and direction of motion, and this is the ratio of the time it takes to define the displacement and the time it takes for the displacement to occur.

Density: =m v: The concept of density is a mass and density in a specific volume, and this density is equal to the mass of the object divided by the volume, that is, m v in the formula, generally speaking, no matter what kind of substance, no matter what kind of state the substance is in, and with the change of temperature and pressure, the volume or density will also change accordingly, for the whole natural world, Relatively high pressures can cause the density in a celestial matter to differ greatly from the common density.

Gravity: g=mg: The name of a force received by an object due to the attraction of the earth is gravity, and the force of gravity is the earth, the direction of gravity has always been vertical downward, and the size of a gravitational force on the object is proportional to the mass of the object, the formula for calculation is g=mg, g in the formula means gravity, and m represents the mass of the object, g is a scale coefficient of magnitude about, the gravity of the object is actually a manifestation of gravitational force on the surface of the earth.

Pressure: p=f s: The ratio of the magnitude of a pressure to the area of force on an object is called pressure, and pressure is used to compare an effect of pressure, for pressure, the greater the pressure effect, the more obvious the pressure effect, and vice versa, the smaller the pressure, the less obvious the pressure effect.

Liquid pressure: p= gh: The pressure of the liquid is a pressure on the side walls and bottom of the inside of the container, and this pressure increases with the depth of the liquid.