9. SpeedSpeed
The change in position of an
object per unit of time:
– Miles per hour
MPH
– Meters per Second
M/Sec
10. VelocityVelocity
The measurement
of the speed of an
object in a specific
direction
N, NE, E, SE, W ,
NW,, S, SW,
North
Northeast
East
Southeast
West
Northwest
South
Southwest
13. Essential LearningsEssential Learnings
Velocity describes both the
speed and the direction of the
motion of an object
It is reported in meters per
second (m/sec) in a specific
direction (m/sec N, E,W or S)
16. Essential LearningsEssential Learnings
On earth weight in Newtons is
~10 your mass in Kiligrams
On earth, acceleration due to
the force of gravity is:
9.8 m/sec2
(meters per second per
second)
20. One More Thing…
Constant Accelleration
– http://www.youtube.com/watch?v=BGfPU_gyqm8
Acceleration Plus and minus
– http://www.youtube.com/watch?v=ixF_Tf4pmE8
27. Key ObjectivesKey Objectives
The student will:
– Identify situations that illustrate
each law of motion
Give examples of the effects
of Inertia
(Newton’s First Law)
30. Key ObjectivesKey Objectives
The student will:
– Demonstrate action and
reaction forces and how they
apply to motion
(Newton’s Third Law)
31. Key ObjectivesKey Objectives
The student will:
– Explain how force and motion
apply to car safety and
technology, rockets and
restraining devices
32. Key TermsKey Terms
Newton’s First Law
– Inertia
Newton’s Second Law
Newton’s Third Law
Balanced Forces
Unbalanced Forces
33. Newton’s First LawNewton’s First Law
InertiaInertia
– A body at rest
will remain at
rest until a force
acts upon it
and…
34. Newton’s First LawNewton’s First Law
“A body will remain
in motion and
travel in a straight
path and constant
speed until a force
acts upon it.”
35. Newton’s First LawNewton’s First Law
InertiaInertia- Often called
the “Lazy Law”…it
says things do what
they are doing until
a force causes a
change to occur
36. Newton’s Second LawNewton’s Second Law
“The acceleration
of an object
depends on the
mass of the object
and the amount of
force applied”
37. Newton’s Third LawNewton’s Third Law
“Whenever one object
exerts a force on another,
the second object exerts
an equal and opposite
force on the first”
ActionAction Reaction orReaction or
CauseCause EffectEffect
39. Unbalanced ForcesUnbalanced Forces
When forces are unequal or
unbalanced, a change in the
motion of an object can be
observed:
– Bowling ball collides with a tennis
ball
40. Essential LearningsEssential Learnings
Sir Isaac Newton (1642 –
1727) The “Father of Calculus”
and one of the greatest
Physicists ever
Through observations and
calculations discovered three
laws of motion.
42. Essential LearningsEssential Learnings
– In addition, any moving object
will remain in motion at a
constant speed and in a
straight line until another
force acts upon it to change
its motion.
.