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+ Physics: Motion

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+ What does one- dimensional motion look like?

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+ What does two - dimensional motion look like?

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+ What kind of motion?

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+ Describing Motion Where are you??

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+ 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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+ Where Are We Going?

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+ 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?

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+ 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

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+ Measuring Distance and Displacement Distance moved is… 27.4 m Displacement is … 27.4 m [toward first base]

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+ Measuring Distance and Displacement Distance moved is… 54.8 m Displacement is … 38.7 m [toward second base]

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+ 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.

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+ 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

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+ 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.

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+ Resultant Vector The sum of vectors is called a resultant vector

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+ 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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+ Practice Questions Page 209

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+ Determining the Time Interval Measured in minutes, hours or seconds What is the time interval?

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+ Activity 5- 1B

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

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+ 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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+

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+ What do slopes mean? Positive slope indicates movement in a positive direction

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+ What do slopes mean? Negative slope indicates movement in a negative direction

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+ What do slopes mean? Zero slope indicates no movement or no change in position

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+ Activity 5- 1D

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