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