Download Speed Velocity and Acceleration notes

Forces & Motion
Motion
• A change in the position of an
object.
• Give an example!
Force
• A force is a
Push
Or
Pull
Mass
• The amount of matter in an object or
substance.
Describe
Acceleration
Describe Acceleration
• A change in velocity – which may be:
– A change in speed
•
•
•
•
Starting
Stopping
Speeding up
Slowing down
– A change in direction
• Acceleration is caused by unbalanced
forces
More
Describe Acceleration
Deceleration is also called negative
acceleration - it means an object is
slowing down
When acceleration is calculated, it may be a
negative number
How do we calculate it?
http://www.harcourtschool.com/act
ivity/newton/index.html to figure
out formulas for F M A
Formulas to live by!
•F=m x a
•m=F/a
•A=F/m
F
M
A
So, what's the answer?
• Mackenzie was pushing a cart that
weighed 15 pounds with 20 Newtons of
force.
• What is the unknown?
• What does it equal?
Describe Speed
Describe Speed
• Speed is a way to describe motion
• Types of speed---– Average speed - Rate of motion calculated by dividing
the distance traveled by the amount of time it takes to
travel that distance
– Constant speed - Speed that does not change
– Instantaneous speed - Speed of an object at any
given time
What is the formula used to
calculate speed?
What is the formula for
calculating speed?
Speed is calculated by dividing distance
by time –
Calculate This Speed
A football field is about 100 m long. If it
takes a person 20 seconds to run its
length, how fast was the football player
running?
Calculate this Speed:
A football field is about 100 m long. If it
takes a person 20 seconds to run its
length, how fast was the football player
running?
Speed = Distance ÷ Time
Speed = 100 m ÷ 20 s
Speed = 5m/s
Remember
to include
the UNITS!!
Velocity
• The speed AND
direction of a moving
object.
Ex: Jerrod was going
35mph southeast.
Qualitative Data
• Deals with descriptions.
• Data can be observed but not measured.
• Colors, textures, smells, tastes,
appearance, beauty, etc.
• Qualitative → Quality
Quantitative Data
• Deals with numbers.
• Data which can be measured.
• Length, height, area, volume, weight,
speed, time, temperature, humidity, sound
levels, cost, members, ages, etc.
• Quantitative → Quantity