Save Busy. Please wait.
or Forgot Password?

Don't have an account?  Sign up
or taken why

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below

Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size     Small Size show me how

# Physics-GS

### Formulas and Units

QuestionAnswer
Velocity - acceleration is constant vf = vi + a t
Linear Displacement - acceleration constant xf = vi t + 1/2 a t2
Final Velocity vf2 = vi2 + 2aΔx
Velocity Units m/s or cm/s
Velocity Formula Δx/Δt=V
Displacement formula Δx = xf-xi
Vector x formula Fx = F cosӨ
Vector y formula Fy = F sinӨ
How to find Ө using x and y Ө= tan–1(Fy/Fx)
Gravitational Formula FG = GmM/r2
Momentum Conservation Formula m1v1 + m2v2= m1v1 + m2v2 (Elastic collisions)
Power Formula P=w/t
Angular Momentum Formula L = mvr= Iw L =angular momentum, m =mass of the small object m1v1 + m2v2 v =magnitude of object’s velocity r = separation between the objects
Centripetal Force Formula F=mv2/r
Work formula W = F d cosӨ W= -μkmgΔx W= TΔxcosӨ W = PΔt
Kinetic Energy Formula KE = ½ mv2 ΔKE = fkd energy lost
Potential Energy Formula PE = mgh (gravitational)
Formula for gravity (general) gravity (general): GmM/r
Spring Formula - Potential Energy PE = ½ kx2 (x from equilibrium)
Heat Formula Q= cmΔT c=heat capacity of substance m=mass of substance Q=Quantity of heat
Change in energy formula ΔE = Q + W W=work E=entropy
Simple Machine Formula - lever Torque = lever arm x force
Spring Periodic Motion Formula T=2π (SQRroot m/k)
Pendulum Formula T=2π (SQRroot L/g)
Period of object period = 1/frequency
Coulomb’s Law Fc = kqQ/r2 FC (force between q and Q)
Force felt by Q formula F = QE (actual force felt by Q)
Ohmas Law VR = IR (VR = resistor’s voltage drop)
Series Resisters Formula Rt = R1 + R2
Parallel Resisters Formula Rt= (1/R1 + 1/R2)–1
Power Lost by each resister PR = IR 2R = VR 2/R
Circular Motion X = R Cos Ө Y = R Sin Ө
Circular Motion Velocity V = 2πr/T V = SqRoot g R TAN Ө
Period Formula T = mg/CosӨ T = mV2/R
Moon Gravity 1/6 that of Earth
Weight Formula W = mg
Distance for planets d = D/(sqroot moon/M of earth) +1
Newton's 3rd Law Formula Fab = -Fba = W
Tension Formula T - Fg = (Fg/g) a EF = T-Fg = ma
Acceleration with Tension a = g(F-Fg)/Fg) a = g sin Ө N = -mg Cos Ө
Freefall formula Drop Drop = Viy/(G/2)
Freefall formula Range Range = (v2/g) sin 2V or d= 1/2 gt2 Max at 45 degrees
Projectile Formula X component Vxf = Vxi Vf = Xi+VixΔt Vfx2 = vix2
Projectile Formula y component Vfy=Viy+2yΔt Yf = ViyΔt+1/2ay(Δt)2 Vfy2 = Viy2 + 2ayΔy
Projectile speed formula Speed = sqroot Vx2+Vy2
Friction Formula Kinetic fk = μk N
Friction Formula Static Fs < μsN
Friction acceleration Formulas a = -μkgCos Ө + g Sin Ө
Drag Force formula F draV2 Vr = Sqroot (2mg/CpA)
Terminal Velocity Formula Vt = sqroot 2mg/CpA
Hook's Law (springs) F = -kx
Work on a spring Wspring = (kx2/2) - (kxi/2)
Power Formula P = FV P (mgh)/(Δt)
Average Power Formula Avg P = W/Δt
Power Units J/s = 1W Joules per second = Watt 1 hp = 746 Watts
Earth Data 6 X 10 24 Kg Radius 6 X 10 6 m
Univeral Gravitational Potential Energy Ugrav = mgy ΔUgrav Ugrav = mg (d+h) mg (yf-yi)
Mechanical Energy KE+PE = E
Four Forces Gravity Electrical Magnetism Strong Nuclear Force Weak Nuclear Force
Kepler's Formula T2/r3
Orbital Motion V = sqroot Gm/r satellite speed T2 = (4π2/Gm)r3
Momentum Formula ρ = mv Angular Momentum (ω)
Rotational Inertia Formula Rotational Inertia = mr2
Impulse formula I = Ft I = Δp I = pf=pi change momentum F= Δp/Δt If no net force Δp = 0
Elastic Collision formulas Vif = (m1-m2/m1+m2) Vi V2f = (2mi/m1+m2)Vi Δp = 0 ΔE =0
Inelastic collisions h = 1/2 (m1+m2)Vf2/(m1+m2)g ΔP = 0 E not conserved
Harmonic Motion 1/2kx2=1/2mv2 (pedulum)
Restore Force ԐF = -kx restore ԐF = -k-x compression
Spring Acceleration a = (k/m)x
Tangential SPeed V = rω V = sqroot ((kx)/m )
Potential Inertia -Pendulum l = mv2
Potential Inertia - Hoop l= 1/2mr2
Radian Measures s/r =Ө or C=2πr s = arc length 1/2 circle = S= 1/2C = 180 degrees s/r = π 2π/360 = 1, 180= S/R = π, 90 = S = 1/4C, S = (30/60)C = 1/12, 360 = 2π
Center of Mass - Centripetal Force F = mvr2/r
Linear Momentum linear momentum = mv
angular momentum angular momentum = mvr
Center of Mass rcm = (m1r1+m2r2)/(m1+m2)
Revolution or cycle n = S/C = S/(2πr)
Angular Velocity (ω) ω= 2πf ω = r(ΔӨ/Δt) V = rω
Angular Velocity (ω) Units 1/s or s-1 Hertz (Hz) = 1s-1 radian /s
Acceleration - using angular a = v2/r a =rω2
Force Normal - angular FN = mg = Mrω2 ω = sqroot (g/r)
Revolution T = period = 1 Revolution 1 rad/s = 9.55 r/min = 0.159 r/s
Torque Ft=Mat = Mrα F = T r = R a = Iω
Moment of Inertia I = mr2
Rotational KE KErot = 1/2Iω 2 KEtot = KEin+KEout = 1/2mV2+1/2Iω2 K = 1/2lω2 KE=1/2m(Rw)2 = circle
Angular Momentum L =r(perpendicular)mv
Aphelion V = r(perpendicular) ω Tangential SPeed V = rω Orbit speed
Created by: pheinen3

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

# Pass complete!

 "Know" box contains: Time elapsed: Retries:
restart all cards