#### Motion - Riverside Prep PAC Middle School

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Motion - Riverside Prep PAC Middle School

Mrs. Larm
Motion
is when its distance from another
stationary object is changing
Using
a reference point
Describing
distance
Measurement are in ____________________.
Formula
is ______________________
Constant
Average
speed: same speed
speed: changing speeds
total distance / total time
Velocity
is speed and direction
Examples
Graphs
(x,y)
Slope:
y₂ - y₁/ x₂ - x₁
Slope
intercept form: y = mx + b
m= slope
b = y intercept
x = linear line
x ² = U shaped curved line (parabola)
Why
do you need a reference point to know
if an object is moving?
What is the difference between an object’s
speed and an object’s velocity?
The bamboo plant grows 15 cm in 4 hours. At
what average speed does the plant grow
Times (s)
Baby Sarah distance
(m)
Baby Scott distance
(m)
0
0
0
1
0.5
0.4
2
1
0.8
3
1.5
1.2
4
2
1.6
What is each baby’s speed?
Distance
= speed x time
Acceleration:
increasing speed, decreasing
speed, or changing direction
Calculating
acceleration:
Acceleration= final velocity – initial velocity/ time
Time is squared m/s²
An eagle accelerated from 15m/s to 22m/s in 4 seconds.
What is the eagles average acceleration?
Linear
means
Example
Nonlinear
Example
means
Unbalanced
acting forces are unequal and will cause the
object to move.
Balanced
force:
forces:
All forces are equal and the object will not
change its motion or nonmotion
That
an object at rest will remain at rest and
an object that is moving at a constant
velocity will continue moving unless acted
upon by an unbalanced force.
Inertia: is the tendency of an object to resist
change in motion.
Mass: is the amount of matter in an object.
The
net force on an object is equal to the
product of its acceleration and its mass
Force( newtons) = mass x acceleration
Acceleration
= force / mass
States
that if one object exerts a force on
another object, then the second object
exerts a force of equal magnitude in the
opposite direction on the first object
Friction
acts in the opposite direction of
motion
Two factors:
Type of surface
How hard the surfaces are push together (weight)
Momentum
= mass x velocity
Two
moving objects: transfer of speed from
the last object to the first object
One
moving object: transfer of speed from a
moving object to a stopped object which
causes it to move a rate of the moving object
Two
connected object: share the speed