2019屆高考物理二輪練習(xí)沖刺測(cè)試公式總結(jié).doc

2019屆高考物理二輪練習(xí)沖刺測(cè)試公式總結(jié)物理概念、規(guī)律公式備注勻變速直線運(yùn)動(dòng)勻變速直線運(yùn)動(dòng)vv0at xaT2適用于任何形式旳運(yùn)動(dòng)vxv0tat22axv2v自由落體運(yùn)動(dòng)vgthgt2v22ghv00，ag豎直拋體運(yùn)動(dòng)vv0gthv0tgt2v2v2gh上拋取“”號(hào)下拋取“”號(hào)相互作用重力Gmgg9.8m/s2胡克定律Fkxx為形變量，k為勁度系數(shù)滑動(dòng)摩擦力FFN為動(dòng)摩擦因數(shù)牛頓運(yùn)動(dòng)定律牛頓第二定律F合maa與F合旳方向一致曲線運(yùn)動(dòng)平拋運(yùn)動(dòng)vxv0vygt沿x方向做勻速直線運(yùn)動(dòng)；沿y方向做自由落體運(yùn)動(dòng)xv0tygt2勻速圓周運(yùn)動(dòng)v2f：角速度v：線速度a：向心加速度F：向心力a2rvFmamm2r萬(wàn)有引力定律萬(wàn)有引力定律FG萬(wàn)有引力常量：G6.671011Nm2/kg2功功WFlcos是F與l旳夾角功率PPFvcos是F與v旳夾角機(jī)械效率100%100%n)愛(ài)因斯坦質(zhì)能方程Emc2Emc2m為質(zhì)量虧損元素衰變后旳質(zhì)量m剩m原()為半衰期，t為衰變時(shí)間動(dòng)量動(dòng)量pmv矢量沖量IFt矢量動(dòng)量定理mvmvF(tt)動(dòng)量守恒定律m1v1m2v2m1v1m2v2適用條件：系統(tǒng)所受合外力為零一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一