velo,speed,acc & conversions

Question 1

what is speed?

Answer 1

uniform motion that involves travelling a distance in a specified time

Question 2

what is the formula for speed? What are the variations?

Answer 2

v = >d
>t
v = average speed
>d = distance travelled
>t = time

to find >d:
>d = v x >t

to find >t:
>t = >d
v

Question 3

what is uniform motion?

Answer 3

an object that is travelling at a constant rate in a straight line

Question 4

How does the metric systems work?

Answer 4

is made up of 7 base units (we focus on meters, grams, litres, and Joules)

Question 5

True or False: physics measures in grams, like chemistry

Answer 5

False! Physics measures in kilograms

Question 6

what is the process of moving UP a base unit?

Answer 6

divide by the factor shown on the chart (or move the decimal to the left by the # of the exponent)

Question 7

what is the process of moving DOWN a base unit?

Answer 7

multiply by the factor on the chart (or slide the decimal to the right however many times the # states)

Question 8

what is the formula for changing the units from seconds to hours? hours to seconds?

Answer 8

seconds to hours: s / 3600
hours to seconds:
hours x 3600s/hour

Question 9

what is the formula for changing the units from seconds to minutes? minutes to seconds?

Answer 9

seconds to minutes: s / 60
minutes to seconds:
min x 60s/min

Question 10

what is the formula for changing the units from hours to min? min to hours?

Answer 10

hours to min: hours x 60
min to hours: mins / 60

Question 11

What is acceleration?

Answer 11

change of velocity over time, vector quantity

Question 12

What is velocity? What are the two types?

Answer 12

vector: magnitude & direction. indicated by an arrow above symbol ~>V
scalar: magnitude only. how much or how far

Question 13

What are the two types of acceleration?

Answer 13

1. Positive acceleration
   -positive magnitude & positive direction (speeding up going north, east, up, or right)
   -negative magnitude & negative direction (slowing down going south, west, down, left)
   2.Negative acceleration
   -positive magnitude & negative direction (speeding up going south, west, down, or left)
   -negative magnitude & posture direction (slowing down going north, east, up, or right)

Question 14

what is the formula for acceleration? what are the variations?

Answer 14

~>a = ~»V
>t
~>a = ~>Vf- ~>Vi
>t

find >t:
>t = ~»V
~>a
find Vf:
Vf = (>t x ~>a) + Vi
find Vi:
Vi = Vf - (>t x ~>a)

Question 15

True or False:
pos slope=pos acceleration
neg slope=neg acceleration

Answer 15

True!

Question 16

determine which between distance and displacement are scalar and vector?

Answer 16

distance (>d) = scalar
displacement (-> >d)= vector

Question 17

determine which out of NESW, and up, down, left & right are positive & negative directions

Answer 17

north & up = pos
east & right = pos
south & down = neg
west & left = neg

Question 18

what is the formula for velocity? what are the variations?

Answer 18

~>V = ~»d/>t
~>V = velocity
~»d = displacemebt
>t = time

find ~»d:
~»d = ~>V x >t
find >t:
>t = ~»d
~>v