What are all the formulas in junior high school physics?

Ohm's law i=u r

Current: iamperes (a).

Voltage: U volts (V).

Resistance: r ohms ( ).

Specific heat capacity formula.

q=mc*t

Calories: q joules (J).

Specific heat capacity: cj (kg*).

Mass: m kilograms (kg).

Combustion energy formula (calorific value formula).

Q=mq Calories: Q joules (J).

Mass: m kilograms (kg).

Calorific value: q joules per kilogram (j kg).

Work work formula: w=fs or w=gh

Work: w joules (j).

Force: f Newton (n) Gravitational force: g Newton (n).

Distance traveled along the force: s meters (m) Rising height: h meters (m) Power formula:

p=w t power: p watts (w).

Work: w joules (j).

Electrical power formula.

Power: watts (W).

Voltage: U volts (V).

Current: iamperes (a).

Power: watts (W).

Current: iamperes (a).

Resistance: r ohms ( ).

Power: watts (W).

Resistance: r ohms ( ).

Voltage: U volts (V).

The formula for electrical work w=pt

Electrical energy: w kilowatt hours (kw*h).

Power: watts (W).

Note: 1In the above equation, [p] can be substituted for electric power 1 32The unit of electrical power (kWh) can be converted to joules, 1kw*h = pressure formula:

Solid pressure p=f s

Pressure: Pascal (PA).

Pressure: Newton (n).

Area: s square meters ( ).

Liquid pressure p= gh

Pressure: Pascal (PA).

Liquid density: kilograms per cubic meter (kg m).

Formula for gravity: g newtons per kilogram (n kg).

Depth: h meters (m).

Buoyancy formula. Buoyancy: F Newton (n).

Discharge water weight: g Newton (n).

Liquid density: kilograms per cubic meter (kg m).

Formula for gravity: g newtons per kilogram (n kg).

Discharge liquid volume: v cubic meters (m).

Buoyancy: F Newton (n).

Buoyancy: F Newton (n).

Weight: g1 Newton (n).

Gravity after sinking into water: g2 newtons (n).

Density formula = m v

Density: kilograms per cubic meter (kg m).

Mass: m kilograms (kg).

Volume: v cubic meters (m).

Gravity formula: g=gm gravity: g newtons (n).

Mass: m kilograms (kg).

Gravitational mass relationship: g Newtons per kilogram (n kg).

Velocity formula: v=s t

Speed: v meters per second (m s).

Distance: m (m).

1. Velocity v(m s)v=s t; S: Distance, T: Time.

2. Gravity g(n)g=mg; m: quality; G: Or 10 N kg.

3. Density (kg m3) m vm: mass; v: volume.

4. The direction of the resultant force f1 + f2 is the same: f1+f2.

5. Opposite direction: when F1-F2 is in opposite directions, F1 > F2.

6. Buoyancy f float (n) f float g object - g view; g Visual: The gravitational force of an object in a liquid.

7. Buoyancy f float (n) f float g object; This formula only applies to objects that are floating or levitating.

All the formulas for physics are as follows:

1. The formula of force

Force = mass acceleration, where the unit of force is Newton (n), the unit of mass is kilogram (kg), and the unit of acceleration is meter per second squared (m s 2).

2. The formula of work

Work = force displacement cos, where the unit of work is joules (j), the unit of force is Newton (n), the unit of displacement is meter (m), and the unit of angle is radians (rad).

3. The formula of power

Power = work time, where the unit of power in the opening gear is watts (w), the unit of work is joules (j), and the unit of time is seconds (s).

4. The law of conservation of mechanical energy

The law of conservation of mechanical energy refers to the fact that the total amount of mechanical energy remains unchanged in a closed system where no external force does work. Mechanical energy is equal to the sum of kinetic energy and potential energy.

Among them, the formula of kinetic energy is: kinetic energy = 1 2 mass The square of velocity, where the unit of mass is kilograms (kg), and the unit of velocity is meters per second (m s); The formula for potential energy is: potential energy = gravitational height, where the unit of gravity is Newton (n) and the unit of height is meter (m).

5. Simple mechanical formula

6. The formula for speed

Speed = distance time, where the unit of speed is meters per second (m s), the unit of distance is meters (m), and the unit of time is seconds (s).

7. The formula for acceleration

Acceleration = change in velocity time, where the unit of acceleration is meters per second squared (m s 2), the unit of change in velocity is meters per second (m s), and the unit of time is seconds (s).

8. Uniform speed linear motion formula

Displacement = initial velocity time + 1 2 acceleration the square of time, where the unit of displacement is meters (m), the unit of initial velocity is meters per second (m s), the unit of time is seconds (s), and the unit of acceleration is meters per second squared (m s 2).

9. Newton's first law

Newton's first law, also known as the law of inertia, states that if an object is not acted upon by an external force, then it will remain in a uniform linear motion or remain at rest. This law can also be referred to as the "law of retention of inertia".

10. Newton's second law

Newton's second law states that when an object is subjected to an external force, its acceleration is proportional to the magnitude of the external force and inversely proportional to the mass of the object, i.e., f = ma, where f is the magnitude of the external force, m is the mass of the object, and a is the acceleration of the object.

11. Newton's third law

Newton's third law, also known as the law of action reaction, states that for any force, there will be a reaction force of equal magnitude and opposite direction.

12. Pressure formula

Pressure = force area, where the unit of pressure is Pascal (Pa), the unit of force is Newton (n), and the unit of area is square meters (m2).