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An object is in motion if the distance from
another object is changing.
A reference point is the starting point you
choose to describe the location, or position of
an object.
Position is an object’s distance and direction
from a reference point.
Displacement is the difference between the
initial (first) position and the final position of
an object.
Distance is the length traveled.
45 m
Distance = 90 m
Displacement = 0 m
Constant Speed = speed stays the same
Instantaneous Speed = speed at a specific
instant in time.
Speed changes when: you slow down
you speed up
you stop
Velocity is the speed AND direction of a
moving object.
Velocity changes when: speed changes
direction changes
both change
Speed = Distance
Average Speed = Total Distance
Total Time
Distance = Speed X Time
Time = Distance
A mail truck takes 20 s to move between
mailboxes that are 10 m apart. What is the
average speed of the mail truck?
Sound travels 330 m/s. You hear the sound
of the bat hitting a home run 0.5 s after you
see it. How far away are you?
Steve swims 10 m in 20 s. What is his
average speed?
Two cities are 250 km apart. How much
time will it take to travel from one city to
the other at 100 km/h?
If a train travels 120 km at 30 km/h, how
long will it travel?
An eagle flies 300 m in 12 s, what was its
average speed?