Sec.1 describing and measuring_motion

Describing and Measuring Motion 1-1

Learning Objectives ,[object Object],[object Object],[object Object]

Key Terms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How Fast and How Far ,[object Object],[object Object],[object Object]

Recognizing Relative Motion ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

What is A reference point? ,[object Object]

[object Object],[object Object]

Describing Distance ,[object Object],[object Object],[object Object],[object Object],[object Object]

What do scientists use to measure the length of an object smaller than a yard? ,[object Object],[object Object]

How do scientists measure long distances? ,[object Object]

How do scientists calculate speed? ,[object Object],[object Object],[object Object],[object Object]

Constant Speed ,[object Object],[object Object]

What is average speed? ,[object Object],[object Object],[object Object]

Average Speed Average Speed = distance time

Example; A cyclist travels 32 kilometers during the first 2 hours. Then the cyclist travels 13 kilometers during the next hour. The average speed of the cyclist is the total distance by the total time. ,[object Object],[object Object],[object Object],Total distance = 32 km + 13 km = 45 km Total time = 2 h + 1 h = 3 h Average speed = 45 km / 3 h = 15 km/h

Describing Velocity ,[object Object],[object Object],[object Object]

Velocity speed of an object in a certain direction. seconds 0 2 1 3

Speed=? Velocity=? 16 meters 12 meters 20 meters Total time= 4 seconds A B

Graphing Motion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Slope of a line ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Calculating Slope ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Slope means the Speed ,[object Object]

Section Review Questions ,[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],1.6 2 4 1.2 1.5 3 0.8 1 2 0.4 0.5 1 0 0 0 Baby Scott Distances (m) Baby Sarah Distance) Time (s)

Sec.1 describing and measuring_motion

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Sec.1 describing and measuring_motion