SAT II 物理常用公式总结.pdf

更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la SAT II 物理常用公式总结 http www liuxue la SAT II PHYSICS 1 1ver Vector and Forces torque force length of moment arm the sum of the clockwise moments the sum of the counterclockwise moments Motion and Forces 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la av distance covered average speed time required displacement average velocity time distance covered average speedtime S v change in velocity acceleration time required for change Motion with cons fi t vv v a tt tant acceleration starting from rest 2 avf ff vv vat vgt 22 22 11 22 2 2 average speed final velocity acceleration elapsed time distance covered 2 ff av f if av SatSgt vas vgs v v a t s vv v 2 22 1 2 2 change in momentum mass change in velocity momentum massvelocity fi i fi vvat Svtat vvas Ft Centripetal Force 2 c v a r 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la 2 2 2 12 2 2 4 Gravitational Fields c s mv F r r v T r a T Gm m F r GM v r Work Energy Simple Machines 2 2 workforce distance gravitational potential energy wh mgh 1 kinetic energy 2 energy produced mc mv 2 force of friction during motion coefficient of sliding friction normal work against friction frictiondistance object moves 1 elastic potential energy kx 2 force distance time work power time power R E RR E resistance actual mechanical advantage AMA actual effort F AMA F work output resistance distance resistance moves work output F R work input effortdistance effort moves work input F E S 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la RE ER Under ideal conditions there is no useless work Then work output work input FS IMA ideal mechanical advantage FS For a machine work output efficirncy work input AMAideal effort efficiency IMAactual effort weight of objectlength of plane ideal effortheight of plane IMA Fluid Mechanics For solids and liquids density of substance density of water weight of substance weight of equal volume of water mass of substance mass of equal volume of water mass density volume sp gr sp gr sp gr h height d density F P A Phdg FhdgA 2 2 diameter of large piston diameter of small piston For a solid that sinks in water weight in air apparent loss of weight in water For a liquid apparent loss in weight of solid FA IMA fa sp gr sp gr in liquid apparent loss in weight of solid in water Heat Temperature Thermal Expansion 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la 11 22 1 122 1 122 12 change in length oringinal lengthcoeff of expansiontemp change V V V volume T absolute temperature P pressure T T pVp V pVp V TT Measurement of Heat F V heat required for melting mass H heat required for vaporization mass H heat gianed or lost mass sp ht temp change mass melted heat of fusion mass vaporized heat of vaporization Heat and Work Heat Transfer heat flow change ininternal energy work done by system Q U W Wave Motion and Sound Periodic Motion For a stretched spring 2 For waves 1 wavelength the number of beats the difference between the two frequence Closed Pipes 4 Vibrating Air Columns Open Pipe a Fkx m T k T f vf l s 2 2 a s l l Geometrical Optics Reflection and Refraction 1 2 For a special mirror the focal length is equal to one half of the radius of the spherical shell 2 Law of Refraction sin index of refraction sin fR nn 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la 21 12 speed of light in vacuum or air speed of light in the substance sin sin Images Formed by Lenses 111 object distanceimage distancefocal length 111 size of imageimage distance size of objecto n n n pqf bject distance magnification m OBJECT DISTANCE IMAGE CHARACTERISTICS Convex Lens or Concave Mirror greater than 2f 2f between f and 2f less than f real smaller between f and 2f inverted real same size 2f inverted real larger greater than 2f inverted virtual larger q more than p erect Concave Lens or Convex Mirror any distance virtual smaller erect q less than p 2 focal length of the objective telescopic magnification focal length of the eyepiece intensity of source illmination distance Physical Optics Interference and Diffraction x d wavelength d distance between the two silts L distance between the barrier and the screen x distance between the central maximum and the first bright fringe L Static Electricity Electric Circuits 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la 12 2 E electric field intensity F the force exerted on positive charge q work potential difference charge E electric field intensity V the difference of potential between the pl kq q F d EF q work V q EV d 2 ates length in meters R resistance in ohms A cross sectional area in meter k a constant for the material and is called resistivity unit is ohm meter TTT TTT TTT work V q L kL R A IVR RVI VI R series circuit parallel circuit series parallel circuit current 12T III 12T III 312T IIII resistance 12T RRR 12 111 T RRR 12 3 12 T R R RR RR voltage 12T VVV 12T VVV 132312 T VVVVV VV IR drop 111222 TTT VI R VI R VI R etc symbols 112 current through R potential difference across R etc IV 2 2 0 24 T VemfIr HI Rt HI Rt 22 PVI PI R PVR energypowertime Magnetism Meters Motors Generators 更多 SAT 考试资料 请访问 http www liuxue la 留学啦 http www liuxue la the length of wire in the magnetic field B the flux desity v velocity second emfnumber of turns on secondary primary emfnumber of turns on primary power supplied by secondary efficienc FILB L FqvB y power supplied to primary when the efficiency is 100 sspp V IV I sspp V IV Iefficiency max max max 222 max 2 2 sin sin sin sin Tf IIt VVt VIRt PI RIRt 22 max 2 maxmax 22 max max 1 2 1 0 0707 2 1 2 0 707 rms avgrm