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A-LevelAs物理(9702)paper2公式总结

2022-06-02 13:41:42来源:考而思在线阅读量:94

摘要

距离ALevelAS物理的paper2考试还剩几天的时间,不知道大家都准备的怎么样?今天特意为大家从网上找到了一些As部分务必掌握的公式,相信背过并熟练掌握这些公式,对我们的考试一定有很大帮助。Forceandmotion力和运动velocity,v=Δs/Δtacceleration,a=Δv/Δtv=u+ats=ut+1/2at2v2=u2+2ass=(u+v)t/2resultantforc

距离A Level AS物理的paper 2考试还剩几天的时间,不知道大家都准备的怎么样?今天特意为大家从网上找到了一些As部分务必掌握的公式,相信背过并熟练掌握这些公式,对我们的考试一定有很大帮助。

Force and motion力和运动

velocity, v=Δs/Δt

acceleration, a=Δv/Δt

v=u+at

s=ut+1/2 at2

v2=u2+2as

s=(u+v)t/2

resultant force, F=ma

weight, W=mg

torque of a couple=force×perpendicular distance between forces

work done, W=Fscosθ (θ is the angle between F and s)

gravitational potential energy, GPE=mgh

kinetic energy, KE=1/2 mv2

internal energy, U=∑PE+∑KE

power,P=W/t=Fv

momentum, p=mv

resultant force, F=?p/?t

conservation of momentum,

m1u1+m2u2=m1v1+m2v2

density, ρ=m/V

pressure, p=F/A

pressure, p=ρgh

Materials 材料学

tension, F=kx

stress, σ=(force))/(cross-sectional area)

strain, ε=(extention))/(original length))

Young modulus, E=σ/ε

elastic potential energy or strain energy,

E=1/2 Fx=1/2 kx2

Electricity 电学

electric field strength, E=F/Q

electric field strength in a uniform field,E=-V/d

current,

I=?Q/?t

I=nAvq

the elementary charge, e=-1.6×10-19C

potential difference, V=?W/?Q

resistance, R=V/I

power, P=VI=V2/R=I2R

work done, ?W=VI?t

combined resistance of resistors in series,

combined resistance of resistors in parallel,

resistivity, ρ=RA/l

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