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Motion & Speed Motion & Speed NotesNotes
TEKS 6.8B identify and describe the changes in position, direction and speed of an object when acted upon by unbalanced forces.
TEKS 6.8C calculate average speed using distance and time measurements
TEKS 6.8D measure and graph changes in motion
28 JAN 1528 JAN 15
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Starter:
28 29
Calculate
and glue
in
74 75Motion and Speed Notes
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Starter:Starter:A ball travels 18 cm in 4 seconds. What is the speed of the ball? Record and bubble your answer in the grid.
18
4 5
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Starter:
74 75Motion and Speed Notes
Fill
in
the
blan
ks
and
glue
in
Practice:
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Forces Forces are are pushes or pulls pushes or pulls
needed to:needed to:
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start start an an object object movingmoving
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stop stop an an
object’s object’s
motionmotion
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change the change the speedspeed or or directiondirection of of objectsobjects
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MotionMotion is a is a change in change in
positionposition relative relative to another to another
object. object.
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The The distancedistance an an object moves in a object moves in a given amount of given amount of timetime which which determines the determines the speedspeed..
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Speed is Speed is measured in measured in units of units of metersmeters per per secondsseconds or or kilometerskilometers per per hourhour. .
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The The formula formula for finding for finding speed is: speed is:
SpeedSpeed= =
distancdistance e
time time
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Motion can Motion can be shown be shown in a in a graphgraph. .
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An object moving An object moving very fast might very fast might have a graph that have a graph that looks like this: looks like this:
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If a force is applied If a force is applied to a to a movingmoving object, object,
the object can the object can speed upspeed up, , slow slow
downdown or come to a or come to a stopstop..
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A force can A force can also change also change the the directiondirection an object is an object is moving. moving.
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VelocityVelocity is when is when a force changes a force changes the the speedspeed and and the the directiondirection an an object is moving.object is moving.
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Net ForceNet ForceThe total of the The total of the
forces acting forces acting on an object.on an object.
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Forces like Forces like gravitygravity or or buoyancybuoyancy can act on can act on
objects objects that are that are
notnot moving.moving.
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Forces may Forces may be be balancedbalanced
or or unbalanced.unbalanced.
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Balanced Balanced
forces do forces do
notnot result result
in a in a
change of change of
motion.motion.
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EqualEqual forces in forces in opposite opposite
directions directions cancelcancel each other out so each other out so there is there is zerozero net net
force.force.
= 0-
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Unbalanced Unbalanced forces forces always always result in a result in a change of change of motionmotion or or directiondirection..
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AddAdd the forces the forces if they are in if they are in
thethe samesame direction.direction.
+ =
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SubtractSubtract the the forces if they forces if they
are in are in opposite opposite
directions.directions.
=-
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21 JAN 14
Starter:
74 75Motion and Speed Notes
Practice:
Application:
Draw in
examples
and then try on
your own.
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Application:Application:
30 N + 10 N = 40 N to the right
30 N - 10 N = 20 N to the right
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Application: Try on your ownApplication: Try on your own
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Starter:
74 75Motion and Speed Notes
Practice:
Application:
Solve the
speed
equations
Connection:
Exit:
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Connection:Connection:
A train travels 846 miles A train travels 846 miles in 9 hours. What is the in 9 hours. What is the speed of the train?speed of the train?
An airplane flies 3080 km An airplane flies 3080 km from Houston to New York from Houston to New York in 4 hours. What is the in 4 hours. What is the speed of the airplane?speed of the airplane?
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Starter:
74 75Motion and Speed Notes
Practice:
Application:
Solv
e th
e
speed
equatio
n
Connection:
Exit:
A train travels 846 miles in 9 hours. What is A train travels 846 miles in 9 hours. What is the speed of the train?the speed of the train?
An airplane flies 3080 km from Houston to New An airplane flies 3080 km from Houston to New York in 4 hours. What is the speed of the York in 4 hours. What is the speed of the airplane?airplane?
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Exit:Exit:
A car travels 321 km from Houston to A car travels 321 km from Houston to San Antonio in 3 hours. What is the San Antonio in 3 hours. What is the speed of the car?speed of the car?