【物理】高中物理解题必备的65条重要推论,看看你是否掌握了.html（[physics] 65 important deductions that are necessary to solve a high school physics problem, see if you have it. HTML）.docVIP

【物理】高中物理解题必备的65条重要推论,看看你是否掌握了.html（[physics] 65 important deductions that are necessary to solve a high school physics problem, see if you have it. HTML） [physics] the 65 important deductions necessary to solve the physical problem of physics in high school, see if you have mastered 2012-04-04 In preparing for the exam, you must remember some important deductions, so that you will win time in the examination room and improve your answer efficiency. 1. If the three direction of force equal to 120 °, the resultant force is zero. 2. Some forces that are not parallel are acting on the object, so that the object is in a state of equilibrium, and the force of some forces must be opposite to the force of the rest of the force. 3. In the uniform variable linear motion, any two consecutive equal displacement is equal to the difference between the period of time, namely Δ x = aT2 (uniform variable to determine whether an object do linear motion), promotion: xm - xn = (m, n) aT2. 4. In the uniformly variable linear motion, the average velocity of any process is equal to the instantaneous velocity at the point of the process. The vt / 2 = V on average. 5. Uniform acceleration linear motion with zero initial velocity (1) T, 2T, 3T,... The instantaneous speed ratio is: v1: v2: v3:... :.vn = syntactic sugar for 1:2:3:... : n. (2) within T, 2T, 3T, etc. The ratio of displacement to: x1: x2: x3:... : xn = 12:22:32:... : n2. (3) the first T, the second T, the third T, and... The ratio of displacement is: Ⅱ Ⅰ x: x: x Ⅲ:... : xn = 1:3:5:... (2 n - 1). (4) the ratio of time used by continuous equal displacement: T1, t2, t3,... Tn = 1:2 1/2-1) : (3 1/2-2 1/2) :... : [n1/2 - (n - 1) 1/2]. 6. When the object does the uniformly decelerating linear motion, the final velocity is zero, which can be equivalent to the backward uniformly accelerated linear motion with the initial velocity zero. 7. The corresponding positive and reverse processes corresponding to the uniformly decelerated linear m