Physics

Question 1

SOHCAHTOA

Answer 1

sine=opp/hyp
cos=adj/hyp
tan=opp/adj

Question 2

pythagorean theorem

Answer 2

a2 + b2 = c2

Question 3

s=

Answer 3

s=d/t

Question 4

v=

Answer 4

v=Δx/t

Question 5

units for speed

Answer 5

m/s

Question 6

units for velocity

Answer 6

m/s but has direction

Question 7

scalar

Answer 7

just magnitude

Question 8

distance is

Answer 8

of steps taken

Question 9

displacement is

Answer 9

shortest route there; position you end at relative to starting point

Question 10

vector

Answer 10

magnitude and direction

Question 11

a=

Answer 11

a=Δv/t

Question 12

opposite=

Answer 12

hyp (sineΘ)

Question 13

adajacent=

Answer 13

hyp (cosΘ)

Question 14

Δx=

Answer 14

v0t + 1/2at^2

Question 15

vf -v0=

Answer 15

at

Question 16

vf^2 =

Answer 16

vo^2 + 2aΔx

Question 17

v avgerage=

Answer 17

1/2(vf + vo)

Question 18

Δx= (second formula)

Answer 18

(1/2 (vf + vo) )t

Question 19

uniformly accelerated motion

Answer 19

motion with constant accelration

Question 20

V product = (multiply vectors formula)

Answer 20

v1v2sin(Θ)

Question 21

Δx versus t graph

Answer 21

1. describes position
2. straight horizontal line=stopped moving
3. slope=velocity
4. negative slope=object moving in opposite direction

Question 22

velocity vs. time graph

Answer 22

1. describes velocity
2. straight horizontal line=constant velocity=no acceleration
3. slope=acceleration
4. area under graph=displacement
5. moving toward center=slowing down
6. at center line=stopped moving
7. slope at any point is the instantaneous acceleration

Question 23

v0 sine (Θ)=

Answer 23

√(2gh)

Question 24

v=

Answer 24

√(2gh)

Question 25

does mass affect air resistance?

Answer 25

no

Question 26

F=

Answer 26

ma

Question 27

inertia

Answer 27

tendency to remain in its present state of motion

Question 28

mass

Answer 28

quantitative measure of object’s inertia

Question 29

weight

Answer 29

gravitational force object exeriences

Question 30

when gravity changes does mass change?

Answer 30

no, you have the same mass on earth and moon. weight changes

Question 31

center of mass

Answer 31

single point at which all mass is considered to be concentrated(perfect balancing point)

Question 32

the 4 forces of nature

Answer 32

1. the strong nuclear force
2. the weak nuclear force
3. gravitational force
4. electromagnetic force

Question 33

center of gravity

Answer 33

the single point at which the force of gravity can be applied to the entire mass

Question 34

Newtons 1st law

Answer 34

law of inertia: object in rest or in motion wants to stay that way unless acted upon by a net force

Question 35

newtons 2nd law

Answer 35

when an object is acted upon by a net force, the change in that object’s state of motion will be inversely proportion to mass and directly proportional to the net force.

F=ma

Question 36

newtons 3rd law

Answer 36

every action there is an equal and opposite reaction…but the force do NOT ACT ON THE SAME SYSTEM

Question 37

newtotons law of universal gravitation

Answer 37

every mass in the universe exerts an attractive force on every other mass in the universe

Question 38

F=

Answer 38

Gm1m2 /(r^2)

Question 39

G (constant)

Answer 39

6.67 x 10^-11 (m^3)(kg^-1)(s^-2)

Question 40

a c=

Answer 40

v2/r centripetal acceleration

Question 41

Fc

Answer 41

mv^2 / r centripetal force

Question 42

centripetal acceleration

Answer 42

objects speed doesnt change yet it is continually accelerating bc of change in direction

Question 43

centripetal force

Answer 43

always points toward center