Linear Motion Chapter 2.1 & 2.2.

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Presentation transcript:

Linear Motion Chapter 2.1 & 2.2

Motion is Relative Everything moves It just depends how you look at something

Distance vs. Displacement How far an object moved from its original location Displacement How far an object is from the starting point

Speed Measure of how fast something is moving Rate: Distance/time (read: distance per time) Common units: m/s (meters per second)

Instantaneous Speed The speed of an object at that particular instant If your driving your car, your speedometer tells you your instantaneous speed

Average Speed Average speed = total distance covered total time interval

Practice Problem 1 If I drive 100 km in 2 hours, what is my average speed?

Answer 1: 100 kilometers/2 hours = 50 km/h

Practice Problem 2: Minute 1: car is stopped and parked Minute 2: car is driving 60 mph Minute 3: car is driving 45 mph Minute 4: car is driving 30 mph Minute 5: car is stopped at a stop sign. If the car only traveled 2.5 miles, what is the average speed of the driver in miles/minute?

Answer 2: 2.5 miles/5 minutes = .5 miles/minute

Practice Problem 3 On my way up north, I got stuck in a traffic jam where we were driving an average speed of 20 mph for 2 hours. How far did I travel during that time?

20 miles/hour = distance/ 2 hours Distance= 40 miles