# Download Speed up Slow down Change direction 2 m/s 2 Ball rolling down a

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Transcript
```•Must go a distance
A change of
position over
time.
•Caused by force
•Can be relative
motion
• running
• the floor
•Skipping
•A statue
•driving
•Sitting still
a measure of how fast
something moves
through a distance
over a definite time
• unit = m/s
•Meters per second
•s = d/t
•Fast or slow
speed
• 25 m/s
•100 km/hr
• 25 m/s2
•6 meters
•5 seconds
•Must have a direction
Speed in a
specific
direction
•vector
Velocity
•2 m/s left
•35 km/hr north
• turning in
circles
•acceleration
•Speed up
The rate at
which velocity
changes.
•Slow down
•Change direction
Acceleration
•2 m/s2
•Ball rolling
down a ramp
•Car turning
•m/s
•Speed stays
same
•velocity
•F=ma
A push or pull
that changes
motion or
shape of
object.
•Unit = newtons
•Obj. may or may not move
•Affects acceleration
•More mass need more force
force
•Balanced
•Gravity
•Friction
•Action/reaction
• mass
•Space has no
gravity or friction
•Same as no force
Two equal
forces in
opposite
directions.
•Net force = zero
Balanced
•Two people
pushing on a
ball that
doesn’t move
force
•Unbalanced
force
•Object moving
•Mass (proportional
relationship)
The resistance
of an object to a
change in speed
or direction.
•Newton’s first law
Inertia
•Hitting a baseball
•Anything with
mass
•Energy
because it
has no mass
The force
objects exert on
each other
because of their
mass.
•Will be different on
different planets
•Pulling force
•Makes things
accelerate
Gravity
•More on Jupiter
•Less on Pluto
•Friction
•space
•Describes how
heavy
The measuring
of the force of
gravity pulling
down on an
object.
•W= mass x gravity
Weight
•Pounds
•kilograms
•mass
•Slows things down
The fluid friction
due to air.
•Parachute of a
skydiver
•When running
•aerodynamics
•Goes opposite the
force
Air
Resistance
•Gravity
•Water resistance
```
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