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Physics: Motion

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Drag picture to placeholder or click icon to addPhysics: Motion

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What does one-

dimensional motion look like?

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What does two -

dimensional motion look

like?

+What kind of motion?

+Describing Motion

Where are you??

+Position

Reference Point – a starting point used to describe the location or the position of an object

Distance – d – the total length between two point or the total length travelled

Position – an object’s distance and direction from a reference point

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Drag picture to placeholder or click icon to addWhere Are We Going?

+Position and Direction

Number lines or coordinate systems are used to specify position

Objects can move in a positive and negative direction North and East – Positive direction South and West – Negative direction

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Why is it important to include the plus and minus signs in the position?

Reference

Point

Describe how the rhinoceros moved?

+Distance and Displacement

Motion is the process of changing position Two ways of describing motion are distance

and displacement

Displacement is the straight-line distance, or the difference between the initial position and the final position of an object

+Measuring Distance and Displacement

Distance moved is…

27.4 m

Displacement is …

27.4 m [toward first base]

+Measuring Distance and Displacement

Distance moved is…

54.8 m

Displacement is …

38.7 m [toward second base]

+Measuring Distance and Displacement

Distance moved is…

109.6 m

Displacement is …

0 m

Displacement is zero because the starting position and the final position are the same.

+Scalar Quantities and Vector Quantities

Distance and displacement are examples of two types of quantities. Distance is a scalar quantity.

Scalar quantity that has only magnitude or size. It is represented by number and units examples: distance, time and temperature

A vector is a quantity that has both magnitude and direction. You must include units. Examples: displacement and position

+Representing Vectors

Arrows are often used to represent vectors.

The length of the arrow represents the size and magnitude or motion and the arrow point represents the direction of motion.

+Resultant Vector

The sum of vectors is called a resultant vector

+Displacement

Where means “change in”

means change in position

is position in meters, m

represents the final position in meters, m

represents the initial position in meters, m

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Drag picture to placeholder or click icon to addPractice

QuestionsPage 209

+Determining the Time Interval

Measured in minutes, hours or seconds

What is the time interval?

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1B

+Uniform Motion

Uniform motion is motion in which the object’s displacement is equal form each time interval

+Graphing Uniform Motion

What would we graph??

Time and position

What would be on the x-axis? Which is the independent variable?

Time (seconds)

What would be on the y-axis? Which is the dependent variable?

Position (cm[right])

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+What do slopes mean?

Positive slope indicates movement in a positive direction

+What do slopes mean?

Negative slope indicates movement in a negative direction

+What do slopes mean?

Zero slope indicates no movement or no change in position

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1D