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

Starter:

28 29

Calculate

and glue

in

74 75Motion and Speed Notes

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

Starter:

74 75Motion and Speed Notes

Fill

in

the

blan

ks

and

glue

in

Practice:

Forces Forces are are pushes or pulls pushes or pulls

needed to:needed to:

start start an an object object movingmoving

stop stop an an

object’s object’s

motionmotion

change the change the speedspeed or or directiondirection of of objectsobjects

MotionMotion is a is a change in change in

positionposition relative relative to another to another

object. object.

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..

Speed is Speed is measured in measured in units of units of metersmeters per per secondsseconds or or kilometerskilometers per per hourhour. .

The The formula formula for finding for finding speed is: speed is:

SpeedSpeed= =

distancdistance e

time time

Motion can Motion can be shown be shown in a in a graphgraph. .

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:

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..

A force can A force can also change also change the the directiondirection an object is an object is moving. moving.

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.

Net ForceNet ForceThe total of the The total of the

forces acting forces acting on an object.on an object.

Forces like Forces like gravitygravity or or buoyancybuoyancy can act on can act on

objects objects that are that are

notnot moving.moving.

Forces may Forces may be be balancedbalanced

or or unbalanced.unbalanced.

Balanced Balanced

forces do forces do

notnot result result

in a in a

change of change of

motion.motion.

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-

Unbalanced Unbalanced forces forces always always result in a result in a change of change of motionmotion or or directiondirection..

AddAdd the forces the forces if they are in if they are in

thethe samesame direction.direction.

+ =

SubtractSubtract the the forces if they forces if they

are in are in opposite opposite

directions.directions.

=-

21 JAN 14

Starter:

74 75Motion and Speed Notes

Practice:

Application:

Draw in

examples

and then try on

your own.

Application:Application:

30 N + 10 N = 40 N to the right

30 N - 10 N = 20 N to the right

Application: Try on your ownApplication: Try on your own

Starter:

74 75Motion and Speed Notes

Practice:

Application:

Solve the

speed

equations

Connection:

Exit:

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?

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?

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?