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AP Physics Chapter 7

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Section 1

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when you are far from earth's surface, what equation must you use?

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Mar 1, 2020

Cards (35)

Section 1

(35 cards)

when you are far from earth's surface, what equation must you use?

Front

U = -G Mm/r²

Back

when is Ug = mgh valid?

Front

near the surface of the earth

Back

equation for angular displacement

Front

θ = θ₀ + w₀t + 1/2αt² θ: angular displacement ω: angular velocity α: angular acceleration t: time in seconds

Back

equation for angular velocity

Front

ω =ω₀ +αt ω: angular speed α: angular acceleration t: time in seconds

Back

centripetal acceleration equation concerning angular velocity

Front

ac = rω²

Back

converting from IM GONNA ASK BECAUSE IDEK

Front

s = θr

Back

equation for angular velocity #2

Front

ω² = ω₀² + 2α(θ - θ₀) ω: angular velocity α: angular acceleration θ: angular displacement

Back

angular displacement

Front

the angle the object rotates through during some interval (measured in radians, NOT degrees) ∆θ

Back

rotational inertia symbol

Front

I

Back

centripetal acceleration

Front

means center seeking, accelerating towards the center

Back

average angular speed

Front

the ratio of the angular displacement to the time interval ω = ∆θ/∆t unit is radians per second

Back

Newton's Universal Law of Gravitation

Front

every particle in the universe attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them

Back

angular position

Front

measured in radians, one rotation is 2π θ = s/r where s is the arc measure and r is the radius

Back

one radian is equal to

Front

57.3°

Back

know how to do the thumb thing in the direction of the rotation

Front

...

Back

why does a car travel around a curve?

Front

friction force

Back

centripetal force

Front

includes forces acting toward a center point, it is not a force itself, it is caused by other forces

Back

torque symbol

Front

Back

angular acceleration

Front

the ratio of the change in the angular speed to the time it takes for the object to undergo the change α = ∆ω/∆t unit is rad/s²

Back

in the Gravitron, what causes centripetal force?

Front

normal force

Back

escape speed formula (broken down) *memorize this!

Front

v = √2GM/R

Back

why does a ball on a string travel in a circle?

Front

tension force

Back

centripetal force equation

Front

F = mv²/r OR Fc= mω²r

Back

equation for torque

Front

T net = Iα I: rotational inertia α: acceleration

Back

if the force that is making something move in a circle disappears, what will happen?

Front

the object will move in a straight line tangent to the circle of motion

Back

how do objects move in a circle?

Front

when they are forced to do so (Newton's first law)

Back

gravitational force equation

Front

Fg = Gm₁m₂/r² G is a constant m is the masses of the two objects r is the distance between the objects

Back

converting from linear velocity to angular velocity

Front

v =ωr

Back

angular acceleration symbol

Front

α

Back

centripetal acceleration equation

Front

ac = v²/r towards the center of the circle

Back

clocks are...

Front

negative (counterclockwise is positive)

Back

angular displacement symbol

Front

θ

Back

angular velocity symbol

Front

ω

Back

converting from linear acceleration to angular acceleration

Front

a = αr

Back

escape speed formula (simple)

Front

K + Ug = 0

Back