MOON'S WORLD
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Buggy Lab
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Unbalanced Forces lab
Unit 3
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Whirly Durly Lab
Content
Unit 1- Kinematics
Unit 2- Forces
Unit 3-circular motion
Unit 4- Energy
Unit 5- Momentum
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Unit 1
Physics of Something
Terminology
Position:
location at a specific time
Distance:
how location changes over a certain time interval
scalar
Displacement:
overall change in position (position final - position initial)
vector
Position-time graph
Equation: y= vt+b
y=dependent variable (position)
t (x) =independent variable (time)
v (m) =slope (velocity)
b=y intercept (when x=0)
Determine velocity and speed from a p/t graph:
instantaneous velocity= y/x
average velocity= (y2-y1)/(x2-x1)
speed= |velocity|
Determine acceleration and starting velocity from a p/t graph:
starting velocity= average velocity of first line segment before changing steepness (in linear relationship)
acceleration= concavity
positive+ concave up= speeding up
positive+ concave down= slowing down
v=v0+ at (find acceleration)
Velocity-time graph
Equation: y=at+b
y=dependent variable (time)
t (x) =independent variable (velocity)
a (m) =slope (acceleration)
b=initial velocity
x intercept = where objects changes motion direction
Determine position, distance and displacement from a v/t graph:
x=1/2at^2 +v0t +xi (find position)
distance =all areas under the curve
displacement = positive area - negative area
Connect representations of motion
Slopes:
p/t slope= v
v/t slope= a
Relationships:
linear graph = constant v/a
flat graph = no v/a
p/t graph point of inflection= acceleration changes sign
a/t jump graphs are
allowed in ideal models
and not real life examples
Problem solving
Procedures:
List all known variables from the question
xi
xf
delta x
vi
vf
a
delta t
Identify variable in question- what are we trying to find?
Identify equation to use- which equation (s) use the given variables and have the variable we are finding
Calculate
convert to same units before plugging in
show all work
Projectile motion
Free fall:
starts when the object is not in contact with another object + in the air assuming no air resistance
Drop:
Horizontal
p/t graph= 0 (nothing's pushing the object to the left/right)
v/t graph= 0
a/t graph= 0
Vertical
p/t graph= negative slope, concave down
v/t graph= negative linear from 0
a/t graph= -g (constant)
Projectile:
Horizontal
p/t graph= linear with constant slope
v/t graph= constant non-zero
a/t graph= 0
Vertical
p/t graph= parabolic
v/t graph= positive to negative linear
a/t graph= -g (constant)
Home
Labs
Unit 1
>
Buggy Lab
Cart on a Ramp Lab
Cart on Ramp Lab
Unit 2
>
Unbalanced Forces lab
Unit 3
>
Whirly Durly Lab
Content
Unit 1- Kinematics
Unit 2- Forces
Unit 3-circular motion
Unit 4- Energy
Unit 5- Momentum
About
Contact
Unit 1
Physics of Something