Junior high school is an important period for children to learn physics, and physics formulas are the foundation of learning physics, and mastering formulas is very important for solving problems. I have prepared a summary of junior high school physics formulas for our children. Parents hurry up to collect it, so that their children can learn physics more easily.
Why do you want to compile a summary of junior high school physics formulas? Since my child's grades have always been at the bottom of the class, he himself has no confidence, but it is not that he does not work hard, it is really difficult to explore by himself, and he will find it laterHigh-level literacyThe key lies in the thinking level and problem-solving skills, which is opened up all of a sudden, and the learning has caught up, which is really gratifying! Of course, this is a long-term process, withHigh-level literacyThe professionalism of the teachers is also inseparable! So. Throughout the learning process, I also sorted these out with my children. The process of organizing is also a process of learning.
The following is a summary of junior high school physics formulas. Please Save!
1.Formula for Movement:
Displacement formula: s = v times ts=v t where ss is displacement, vv is velocity, and tt is time.
Velocity formula: v = fracv=ts velocity is equal to the time the bits are removed.
Acceleration formula: a = fraca=tv u acceleration is equal to the end velocity minus the initial velocity divided by time.
2.Formula of mechanics:
The formula for force: f = m times af = m a force is equal to mass multiplied by acceleration.
Formula for the synthesis and decomposition of forces: f = f 1 + f 2f = f1 + f2 If the direction of the two forces is the same, then the net force is equal to the sum of the two forces; If the direction of the two forces is opposite, then the resultant force is equal to the difference between the two forces.
3.Formula for pressure:
Pressure formula: p = fracp=af The pressure is equal to the force divided by the area.
Liquid pressure formula: p = ho times g times hp = g h liquid pressure is equal to the density of the liquid multiplied by the acceleration due to gravity multiplied by the height of the liquid.
4.Formulas of Optics:
Focal length formula: frac = frac + fracf1=v1+u1 The reciprocal of the focal length is equal to the reciprocal of the image distance plus the reciprocal of the object distance.
Speed of light formula: v = f times lambd**=f The speed of light is equal to frequency multiplied by wavelength.
5.Formula of Electricity:
Voltage formula: v = i times rv = i r Voltage is equal to current multiplied by resistance.
Resistance formula: r = fracr=iv Resistance is equal to voltage divided by current.
6.Formula of Magnetism:
Magnetic field formula: b = frac}b = q v sin f The strength of the magnetic field is equal to the force divided by the charge multiplied by the velocity multiplied by the sinusoidal angle.
Lorentz force formula: f = q times (v times b) f = q (v b) Lorentz force is equal to the charge multiplied by the velocity multiplied by the magnetic induction intensity.
The summary of junior high school physics formulas seems to be numerous. But as long as they grasp the core content, children will be able to solve problems easily. Parents may wish to review these formulas with their children, believing that after mastering these physics formulas, children's physics scores will improve. Let's cheer for our children's studies together!