1. Forces and Motion

2. Forces and Motion
 Lab 1 “Graphing Your Motion; Pages 1-7
 Lab 2 “Gravity’s Pull”; Pages 9 – 16
 Lab 3 “Keep on Truckin’ ”; Pages 15 – 28
 Lab 4 “Laws of Motion”; Pages 29 – 34
 Lab 5 “ Work Made Easy”; Pages 41 – 56
 Lab 6 “ Power to do Work”; Pages 57 –
 Lab 7 “ The Force of Friction”; Pages 35 - 40

3. Forces and Motion
Lab 1 “Graphing Your Motion;
Pages 1-7
Lab 2 “Gravity’s Pull”; Pages 9
– 16

4. Lab 1
Graphing Your MotionGraphing Your Motion

5. Key Objectives
 The Student will investigate and
understand speed, velocity and
acceleration
 The student will construct and interpret
distance-time graphs of speed and
acceleration
 The student will interpret motion and its
direction from analyzing a motion graph

6. Key Terms
 Motion

7. MotionMotion
A change in position in relation
to some fixed object or frame of
reference

8. Essential Learnings:Essential Learnings:
We can graph
motion using
a line graph

9. A positive slope
means that an
object is
moving forward
in relation to a
reference point,
(+:+)
Essential Learnings:Essential Learnings:

10. Essential Learnings:Essential Learnings:
A flat line
represents no
motion or a
Stationary
position (0:+)

11. Essential Learnings:Essential Learnings:
A negative slope
means that an
object is moving
back from or away
from a reference
point
Points B – C (-:+)

12. Essential Learnings:Essential Learnings:
Time is always
moving forward
because it can
not go backward.
Time is always
the x axis in a
motion graph

13. Time
Seconds
1 2 3 4 50
1.5
3
4.5
PREDICTION

14. Time
Seconds
1 2 3 4 50
2
3
4
Activity

15. Lab 2
Gravity’s PullGravity’s Pull

16. Take a look!
 http://www.youtube.com/watch?v=jwPc0kK9VHU

17. Key ObjectivesKey Objectives
The student will:
– Investigate and understand
the effects of gravity and
Newton’s laws of motion

18. Key ObjectivesKey Objectives
The student will:
– Explain and apply the Law of
Universal Gravitation

19. Key ObjectivesKey Objectives
The student will:
– Differentiate between Mass
and Weight

20. Key ObjectivesKey Objectives
The student will:
– Explain the relationship
between mass, the force of
gravity and weight

21. Key TermsKey Terms
Force
Gravity
Weight

22. ForceForce
A push or pull.
The unit of force
is a Newton (N)
which may be
measure with a
spring scale

23. GravityGravity
A type of
force or
attraction
found
between two
masses

24. WeightWeight
The force of
Gravity
(measured in
newtons)
acting on the
mass of an
object

25. Essential LearningsEssential Learnings
Force is defined as a push or a pull
acting on something.
The unit of force is a Newton
named for Sir Isaac Newton a
famous English Physicist
Newtons are measured with a
spring scale

26. Essential LearningsEssential Learnings
Sir Isaac Newton proposed the
Universal Law of GravitationUniversal Law of Gravitation
which states:which states:
– The force of gravity between two
objects is related to their mass and
the distance between them

27. Essential LearningsEssential Learnings
When two masses are attracted to
each other:
– As the mass of each object
increases, the force of gravity
between them increases
– However if the distance between the
two masses increases the force of
gravity between them decreases

28. Formula (Gravity)Formula (Gravity)
F of G~m1 x m2
d2
m1 = Mass of object 1
m2=Mass of object 2
d = Distance between objects

29. Essential LearningsEssential Learnings
The weight of an object is a
measure of the force of gravity
acting on the object
In Physics weight is calculated in
Newton's (N)

30. Essential LearningsEssential Learnings
Weight varies depending on the force
of gravity at a given location
– EX:
At the top of a mountain, weight may
be less than at sea level
However Mass does not change with
location.
Mass is always a constant!

31. One More Thing…..
 Gravity on Moon
– http://www.youtube.com/watch?v=5C5_dOEyAfk
 Gravity Demo
– http://www.youtube.com/watch?v=aT58uS8VK6g

32. Essential Learnings
The End!