How to Describe & Recognize Motion

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Presentation transcript:

How to Describe & Recognize Motion

What is Motion? An object is in Motion when its distance from another object changes An object is in Motion if its position changes relative to another object, or a reference point

What is a Reference Point? A place or object used for comparison to determine if something is in motion Reference Points are stationary, meaning they do not move. Ex: Tree or a Building

time Calculating Speed Speed is the distance an object travels in a given unit of time Speed = distance time (Rate of change in position)

To find the Average Speed divide the total distance by the total time If the speed of an object does not change, the object is traveling at constant speed (Most objects do not move at constant speeds for long) To find the Average Speed divide the total distance by the total time

What is Velocity? Velocity is speed in a given direction When you know the speed & direction of an object’s motion, you can determine velocity Ex. 15 km/hr Westward

What is Acceleration? Acceleration is the rate at which velocity changes In Science Acceleration refers to Increasing Speed Decreasing Speed Changing Direction

Acceleration Graph

STOP =) Complete the 4 speed calculations in your notebook. Write the equation and solve Use the units you are given

Measuring Distance The basic unit of length or distance is the meter 1 cm = _________ m 1 mm = __________ m 1 km = __________ m 5 m = __________ cm

Practice Problems time Work with a partner to complete the speed calculations at you lab table. Write out the equation and solve each problem in your notebook. Speed = distance time

What is the speed of a person that walked 247km in 60mins? What is the speed of a train that took 2hrs to travel 192km? A car covered 1500km in 1 day. What is the speed of the car in m/hr? A plane traveled 1154 miles in a hour and a half. What was the speed?