notes rb labs 1 and 2

Forces and Motion

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

Forces and Motion

Lab 1 “Graphing Your Motion; Pages 1-7

Lab 2 “Gravity’s Pull”; Pages 9 – 16

Lab 1

Graphing Your MotionGraphing Your Motion

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

Key Terms

Motion

MotionMotion

A change in position in relation to some fixed object or frame of reference

Essential Learnings:Essential Learnings:

We can graph motion using a line graph

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



A flat line represents no motion or a Stationary position (0:+)


A negative slope means that an object is moving back from or away from a reference point

Points B – C (-:+)


Time is always moving forward because it can not go backward.

Time is always the x axis in a motion graph

TimeSeconds

1 2 3 4 50

1.5

3

4.5PREDICTION

TimeSeconds

1 2 3 4 50

2

3

4Activity

Lab 2

Gravity’s PullGravity’s Pull

Take a look!

http://www.youtube.com/watch?v=jwPc0kK9VHU

Key ObjectivesKey Objectives

The student will:– Investigate and understand

the effects of gravity and Newton’s laws of motion


The student will:– Explain and apply the Law of

Universal Gravitation


The student will:– Differentiate between Mass

and Weight


The student will:– Explain the relationship

between mass, the force of gravity and weight

Key TermsKey Terms

ForceGravityWeight

ForceForce

A push or pull.The unit of force

is a Newton (N) which may be measure with a spring scale

GravityGravity

A type of force or attraction found between two masses

WeightWeight

The force of Gravity (measured in newtons) acting on the mass of an object

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


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


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

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


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)


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!

One More Thing…..

Gravity on Moon– http://www.youtube.com/watch?v=5C5_dOEyAfk

Gravity Demo– http://www.youtube.com/watch?v=aT58uS8VK6g

Essential Learnings

The End!

notes rb labs 1 and 2

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