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88 Speed, Velocity, and Acceleration Notes and Calculations
Practice: video
Compare what you think speed and velocity are.
11/03/2014
87
11/03/2014
Starter:
Go over test.Application:
Notes: Glue here when done
Connection Speed/ Velocity Calculations
Exit:While on vacation, Lisa traveled a total distance of 440 miles. Her trip took 8 hours. What was her average speed? Use your speed chart.
Speed, Velocity, and Acceleration Notes and Calculations
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November 3, 2014AGENDA
8.6 B I will be able to differentiate
between speed, velocity, and
acceleration while reading and writing
notes and completing speed/velocity calculations
1 Starter2. Notes3. Calculations’4. Exit
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Date Lecture/ Activity/ Lab Page
Table of Contents
10/20 See Saw Poster 69-7010/21 Balanced/Unbalanced 71-7210/22 Law of Conservation of Mass Lab 73-7410/23 Balancing Chemical Equations Activity 75-7610/24 Balancing Chemical Equations Writing 77-7810/27 Evidence of Chemical Reactions 79-8010/28 Chemical Reactions lab part 1 81-8210/29 Test Review 83-8410/30 Chemical Reactions lab part 2 85-8611/3 Speed, Velocity, and Acceleration Notes 87-88
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Speed, Velocity and
Acceleration
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TEKS 8.6A demonstrate and calculate how unbalanced forces change the speed or direction of an object’s motion
TEKS 8.6B differentiate between speed, velocity and acceleration
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Motion is a change in position relative to
another object. • Uniform motion -
constant speed in a straight line
• Accelerated motion – motion that is changing in speed or direction
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How fast an object is moving is called speed.
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Speed is how far something travels (distance) in a given amount of time.
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The formula for finding speed is
Speed=
distance
time
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The unit for speed is meters or kilometers (distance) and seconds or hours (time).
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It looks like this:
m/secor
km/hr
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Sometimes, it is
important to know the speed and
direction an object is
traveling.
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Velocity is the term
used when referring to the speed
and a direction.
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So, you might say the car is
traveling at 50 km/hr, north.
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Vectors can be used to show the
direction of an object’s motion.
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Which of these
shows and which
25 m/sec67 m/sec
south
90 km/sec
13 km
/secspeed
velocity?
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Acceleration
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When a force is applied to a
moving object, the object can speed
up, slow down, come to a stop or change direction.
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When a force changes the speed, direction or both of an object, we are changing the velocity of the object.
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A change in velocity is called acceleration.
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This is the change in velocity over a given
period of
time.
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The formula for acceleration is
acceleration =
velocitytim
e
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Acceleration is measured meters per second per second or m/sec2
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An object falling to earth is subject to a change in acceleration of 9.8 m/s2 due to gravity.
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Examples of acceleration are….
stepping on the brakes
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pedaling your bicycle faster
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dropping your lunch tray to the floor…
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a dog chasing its tail
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a roller coaster climbing to the top of a hill.
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Potential vs.
Kinetic Energy Notes
TEKS 6.8A compare and contrast potential
and kinetic energy
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Energy is the ability to do work or cause change.
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Law of Conservation of Energy states that energy cannot be created or destroyed.
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Two types of energy…
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Potential energy is energy that is stored, waiting to be released… it has the potential to do work.
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Gravitational potential energy depends on an object’s position or height.
more potential energy
less potential energy
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Chemical energy is stored in the chemical bonds of the compounds that hold substances together.
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Kinetic energy is the energy of motion…
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may be found in many forms such as…mechanical
radiant (light)soundelectrical
thermal
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Energy can be
transformed or
changed from one type to another.
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Potential energy can
be transformed into kinetic
energy.
potential energy
kinetic energy
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As an object’s kinetic energy increases the potential energy decreases.
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88 Speed, Velocity, and Acceleration Notes and Calculations
Practice: video
Compare what you think speed and velocity are.
11/03/2014
87
11/03/2014
Starter:
Go over test.Application:
Notes: Glue here when done
Connection Speed/ Velocity Calculations
Exit:While on vacation, Lisa traveled a total distance of 440 miles. Her trip took 8 hours. What was her average speed? Use your speed chart.
Speed, Velocity, and Acceleration Notes and Calculations