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STA

AR

STAAR PHYSICS

TM

RefeRenCe MATeRIAlS

State of Texas

Assessments of

Academic Readiness

fORCe AnD MOTIOn

displacement

= ∆

d

=

Average velocity

v

∆

t

change in time

avg

v

−

v

final velocity

−

initial velocity

=

f

i

Acceleration

a

=

t

∆

change in time

2

2

2

2

(

final velocity)

(

initial velocity)

−

v

−

v

=

Acceleration

f

i

a

=

2

(

displace

m m ent)

2∆

d

(

)(

)

(

)

2

initial

change

change

1

1

=

2

Displacement

(acceleration)

∆

d

=

v t

∆

+

a t

∆

+

velocity

in time

in time

2

2

i

2

2

v

(tangential velocity)

=

Centripetal acceleration

t

a

=

r

c

radius

=

Net force

(mass)(acceleration)

F

ma

=

net

=

Work

(force)(distance)

W

Fd

=

τ

=

= Fr

Torque

(force)(lever arm)

work

W

=

Power

P

=

t

time

2

2

2

Pythagorean theorem

a

b

c

+

=

GRAVITATIOnAl, eleCTRICAl, AnD MAGneTIC fORCeS

(

)

(

)(

)

mass of

mass of

(

)

( )

1st object

2nd object

universal

Force of gravitational

m m

(

)

=

1

2

gravitation

attraction between

F

G

=

2

distance between

g

2

d

constant

2 objects

centers of objects

(

)

(

)(

)

charge of

charge of

) (

(

)

Force between

q q

1st particle

2nd particle

Coulomb’s

=

1 2

2 charged

F

k

=

constant

2

2

electric

C

d

(distance between particles)

particles

=

Electrical power

(voltage)(current)

P

VI

=

voltage

V

=

I

Current

=

R

resistance

R

R

R

R

. . .

Equivalent resistance for resistors in series

=

+

+

+

1

2

3

1

1

1

1

Equivalent resistance for resistors in parallel

. . .

=

+

+

+

R

R

R

R

1

2

3

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Parent category: Education