Motion - PowerPoint PPT Presentation

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Motion

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Motion What is Motion? any physical movement or change in position or place, relative to a reference point Reference Point Movement X Axis Y Axis Distance = how far ... – PowerPoint PPT presentation

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Title: Motion


1
Motion
2
What is Motion?
  • any physical movement or change in position or
    place, relative to a reference point 

Movement
Reference Point
3
Distance how far an object has moved. Measured
in meters, kilometers (cm or mm)
If each mark represents 10 cm, what is the
distance between the girl and the ball?  ______
Y Axis
X Axis
4
If the girl walks to the red ball, then walks
backwards to the bear, how far has she traveled?
  ______
Y Axis
X Axis
Displacement the distance of a body's change in
position from a starting point.   Her final
displacement is   ______ from the starting point.
5
Speed the distance an object travels per unit
of time  (sec, hour, year..etc)
  • Speed Equation
  • Speed (meters/second)    distance (in meters)  
                                                   
    time (sec)
  •                            s d                
               t

6
A car travels a distance of 500 m in 10 sec.
 What is the car's speed?
  • s d/t

A second car travels a distance of 100 meters in
20 seconds.  What is this car's speed?  
7
More practice.  (Speed distance/ time)
  • An elevator travels from the first floor to the
    25th floor of a building, a distance of 100
    meters, in 30 seconds.  What is the elevator's
    speed?
  • Distance ______
  • Time _______
  • Speed  _______

8
  • Constant Speed vs Changing Speed 
  • Constant speed means that the speed stays the
    same throughout the entire distance
  • Very few things can stay at a constant speed.
     Rather, things usually move at a constant speed
    for a period of time. 

The cyclist speeds up, slows down, stops..etc
9
Speed and the Two-Step
Objective  In this lab, you will measure and
graph your speed and acceleration as you walk
from one point to another. 
Step 1  Marking Your Space.
Step 2  Speed of a Shuffle
Step 3  Speed of a Heel-to-Toe Walk
Step 4  Normal Walk
Switch partners and time again.
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