notes rb labs 1 and 2
TRANSCRIPT
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Forces and Motion
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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
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Forces and Motion
Lab 1 “Graphing Your Motion; Pages 1-7
Lab 2 “Gravity’s Pull”; Pages 9 – 16
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Lab 1
Graphing Your MotionGraphing Your Motion
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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
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Key Terms
Motion
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MotionMotion
A change in position in relation to some fixed object or frame of reference
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Essential Learnings:Essential Learnings:
We can graph motion using a line graph
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A positive slope means that an object is moving forward in relation to a reference point, (+:+)
Essential Learnings:Essential Learnings:
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Essential Learnings:Essential Learnings:
A flat line represents no motion or a Stationary position (0:+)
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Essential Learnings:Essential Learnings:
A negative slope means that an object is moving back from or away from a reference point
Points B – C (-:+)
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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
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TimeSeconds
1 2 3 4 50
1.5
3
4.5PREDICTION
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TimeSeconds
1 2 3 4 50
2
3
4Activity
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Lab 2
Gravity’s PullGravity’s Pull
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Take a look!
http://www.youtube.com/watch?v=jwPc0kK9VHU
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Key ObjectivesKey Objectives
The student will:– Investigate and understand
the effects of gravity and Newton’s laws of motion
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Key ObjectivesKey Objectives
The student will:– Explain and apply the Law of
Universal Gravitation
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Key ObjectivesKey Objectives
The student will:– Differentiate between Mass
and Weight
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Key ObjectivesKey Objectives
The student will:– Explain the relationship
between mass, the force of gravity and weight
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Key TermsKey Terms
ForceGravityWeight
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ForceForce
A push or pull.The unit of force
is a Newton (N) which may be measure with a spring scale
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GravityGravity
A type of force or attraction found between two masses
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WeightWeight
The force of Gravity (measured in newtons) acting on the mass of an object
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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
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Essential LearningsEssential Learnings
Sir Isaac Newton proposed the Universal Law of Gravitation Universal Law of Gravitation which states:which states:– The force of gravity between two
objects is related to their mass and the distance between them
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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
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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
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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)
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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!
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One More Thing…..
Gravity on Moon– http://www.youtube.com/watch?v=5C5_dOEyAfk
Gravity Demo– http://www.youtube.com/watch?v=aT58uS8VK6g
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Essential Learnings
The End!