# MCAT Physics

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1. Kinematics (Linear and projectile motion)

2. Kinematics (displacement vs. distance, average velocity vs. average speed, acceleration)
Displacement is the change in position independent of path length

Distance is the length of the path

Average velocity is displacement over time

Average speed is distance over time

Acceleration is v/t
3. Work and Power
• W=Fdcosθ
• Wnet=ΔKE
• If force is perpendicular to displacement, work is zero
• Power = W/t or Fvcosθ
4. Kinetic Energy, Potential Energy, Total mechanical Energy, Mechanical Advantage, Work-energy theorem, conservation of energy, mechanical advantage
• KE=1/2*mv^2
• PE=mgh
• E=PE+KE
• W(total)=ΔKE
• KE+PE(initial)=KE+PE(final)
• Increase distance causes a lower force
5. Momentum, impulse, conservation of momentum, elastic collision, inelastic collision, perfectly inelastic collision
• p=mv
• J=F(average)t=Δp
• p(initial)=p(final)
• KE(initial)=KE(final)
• KE(initial) doesn't = KE(final)
• Objects stick and move together
6. Newton's Laws
A body in motion is stay in motion (same for rest) unless acted upon by a net force

A body will be accelerated in the same direction of the net force applied to it (F=ma)

All forces are equal and opposite in direction

All matter experience attractive force
7. Frictional forces (Static, Kinetic, centripetal)
0≤fs≤μsFN

fkkFN

Ac=v2/r

Fc=mv2/r
8. Center of mass and torque
Xcm=(m1x1+m2x2+...)/(m1+m2+...)

τ=rFsinθ=lF

r1mgsinθ=r2Fsinθ
9. Fluids (density, specific gravity, weight, absolute pressure, gauge pressure)
ρ=m/V

ρsubstancewater

ρgV

P=F/A

• Absolute pressure = atmospheric pressure (typically 105 Pa) + ρgh
• Gauge pressure = absolute pressure-Patm
10. Buoyant Force, Floating objects, Flow rate, continuity equation, Bernoulli's equation, Pascal's principle, velocity, relationships
Fb=ρgVsubmerged

Fractions of floating object that is submerged = ρobjectfluid

A1v1=A2v2

P+1/2ρv2+ρgh (for state 1)=P+1/2ρv2+ρgh

ΔP=A1F2=A2F1 and W=F1h1=F2h2

velocity inverse with area and pressure
11. Coulomb's Law, Electric field, Electric potential, Potential difference, Electric potential energy
F=kq1q2/d2

E=F/q=kq/d2

• V=kq/d
• U=qΔV=kq1q2/d
12. Current, Ohms Law, Power, Resistance
Current is the flow of electric charge; opposite of electron flow, electrons flow from negative terminal through circuit to positive terminal)

V=IR

P=IV=I2R=V2/R

13. Series circuits
Req=R1+R2+R3+...

I=I1=I2=I3=...

V=V1+V2+V3+...
14. Parallel circuits
Req=(R1+R2+R3+...)-1

I=I1+I2+I3+...

V=V1=V2=V3=...
15. Capacitance, Energy stored, Equivalent capacitance

PE=1/2QV=1/2CV2=1/2Q2/C

Series: Ceq=(C1+C2+C3+...)-1

Parallel: Ceq=C1+C2+C3+...
16. Magnetic force on charge+RH rule, force on current-carrying wire + RH rule, magnetic field
FB=qvBsinθ (fingers in B, thumb in v, palm is FB)

qvB=mv2/r

FB=ILBsinθ (thumb points in direction of current, fingers curl in B)

B=μ0I1I2/d (Tesla)
17. Period, Frequency, angular frequency, simple harmonic motion, mass spring (force, energy, frequency)
T=seconds/cycle

f=1/T or cycles/second

ω=2πf

Period and frequency are independent of amplitude

Fs=-kx, PE=1/2kx2
18. Pendulum (frequency, at equilibrium, at amplitude)

Equilibrium: v is max, a = 0, KE is max, PE=0

Amplitude: v=0, a is max, KE=0, PE is max
19. Wavelength, Young's modulus, velocity, string attached at each end, open pipe, closed pipe
v=fλ

Young's Modulus = (F*L0)/(A*ΔL)

String: λn=2L/n (n=1,2,3...)

Open pipe: λn=2L/n (n=1,2,3...)

Closed pipe: λn=4L/n (n=1,3,5...)
20. Speed of sound relationships, intensity, Beats, Doppler effect
higher density = lower resistance to compression = lower spreed

fbeat=|f1-f2|

(Vo is + if observer moves toward source; Vs is - if source moves toward observer, + on top and - on bottom if both coming closer)
21. Light, diffraction, refraction, snell's law
• lights is an electromagnetic wave that does not need a medium
• wsinθ=nλ (n=1,2,3...)
• n=c/v
• n1sinθ1=n2sinθ2 (n2>n1 light bends toward normal)
22. Mirrors
Spherical: Real images formed on same side as object; virtual images formed on side opposite of object

• Concave: f=r/2, CCMIBEV (ConCave Mirror Inside focal length image is Behind mirror, Enlarged, and Virtual)
• Convex: f=-r/2, CVMVUO (ConVex Mirror Virtual Upright Only)
23. Lenses
Converging: f is positive, CVLBRI (ConVerging Lens Beyond focal point image is Real and Inverted) Diverging: f is negative, DVLVSSO (DiVerging Lens Virtual Image Only Same-side Smaller )
24. Mirror/lens equation, magnification equation
1/f=1/do + 1/di

m=-i/o
25. ljlk
kjllkj
 Author: omar10315 ID: 304422 Card Set: MCAT Physics Updated: 2015-07-07 04:13:45 Tags: physics Folders: Description: MCAT Review Show Answers: