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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
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
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
Speed, Velocity and
Acceleration
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
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
How fast an object is moving is called speed.
Speed is how far something travels (distance) in a given amount of time.
The formula for finding speed is
Speed=
distance
time
The unit for speed is meters or kilometers (distance) and seconds or hours (time).
It looks like this:
m/secor
km/hr
Sometimes, it is
important to know the speed and
direction an object is
traveling.
Velocity is the term
used when referring to the speed
and a direction.
So, you might say the car is
traveling at 50 km/hr, north.
Vectors can be used to show the
direction of an object’s motion.
Which of these
shows and which
25 m/sec67 m/sec
south
90 km/sec
13 km
/secspeed
velocity?
Acceleration
When a force is applied to a
moving object, the object can speed
up, slow down, come to a stop or change direction.
When a force changes the speed, direction or both of an object, we are changing the velocity of the object.
A change in velocity is called acceleration.
This is the change in velocity over a given
period of
time.
The formula for acceleration is
acceleration =
velocitytim
e
Acceleration is measured meters per second per second or m/sec2
An object falling to earth is subject to a change in acceleration of 9.8 m/s2 due to gravity.
Examples of acceleration are….
stepping on the brakes
pedaling your bicycle faster
dropping your lunch tray to the floor…
a dog chasing its tail
a roller coaster climbing to the top of a hill.
Potential vs.
Kinetic Energy Notes
TEKS 6.8A compare and contrast potential
and kinetic energy
Energy is the ability to do work or cause change.
Law of Conservation of Energy states that energy cannot be created or destroyed.
Two types of energy…
Potential energy is energy that is stored, waiting to be released… it has the potential to do work.
Gravitational potential energy depends on an object’s position or height.
more potential energy
less potential energy
Chemical energy is stored in the chemical bonds of the compounds that hold substances together.
Kinetic energy is the energy of motion…
may be found in many forms such as…mechanical
radiant (light)soundelectrical
thermal
Energy can be
transformed or
changed from one type to another.
Potential energy can
be transformed into kinetic
energy.
potential energy
kinetic energy
As an object’s kinetic energy increases the potential energy decreases.
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