<p> Guided Notes: Graphing Speed & Acceleration</p><p>CONSTANT SPEED</p><p>* If something is “constant” what does that mean?</p><p>* It does not ______What does the term ______speed mean? * Speed that does not change is ______speed.</p><p>* Name some things that you think have ______speed.</p><p>Average Speed</p><p>* Average ______is speed that changes or fluctuates.</p><p>* Most moving objects travel at average speed, * they start from a ______still, begin slowly, increase their ______, slow down, speed up, and eventually slow to a ______. </p><p>* On a distance-time graph ______speed would appear as a line that changes direction as it goes across the graph. It would be described as a ______line.</p><p>* A ______line indicates that motion is occurring. * A flat ______line indicates that motion has stopped but time ______.</p><p>Review</p><p>* You will recall from a previous lesson that Speed is calculated using the formula * s = d / t</p><p>* What is the average speed of a 18 wheeler driver who drives non-stop 1600 miles from Houston to Los Angeles in 23 hours? * S = d / t * S = ______. * S = ______mi/hr.</p><p>Acceleration</p><p>* In order to ______acceleration you must understand the difference in speed and velocity.</p><p>* Speed is how long it takes a ______object to travel a distance.</p><p>* Velocity is ______in a given direction.</p><p>* NOW, ______IS THE RATE OF CHANGE IN VELOCITY.</p><p>* You must ______that if either speed or direction changes, the object has ______acceleration. ______</p><p>Formula for CALCULATING ACCELERATION</p><p> acc = ______time for change to occur acc = ______t</p><p>* At the top of the hill the roller coaster is moving 20 m/sec and increases in speed to 40 m/sec at the bottom of the hill. It takes 4 seconds to reach the bottom of the hill.</p><p>* What is the roller’s coaster’s acceleration? acc = ______t ______4 sec acc = 5 m/s/s</p><p>* As it goes up the hill, it slows to 20 m/sec. The total time from the bottom of the hill to the top of the next hill is 5 seconds. What is the acceleration of the roller coaster? acc = ______t acc = ______5 seconds acc = ______</p><p>INTERPRETING A DISTANCE-TIME GRAPH Questions</p><p>* What kind of graph is this?</p><p>* Snail _____was fastest at the beginning of the race.</p><p>* The slowest at the beginning was snail ______.</p><p>* Which snail stopped during the race?______</p><p>* How long was it stopped?</p><p>* How far had snail A gone after 2 hours?</p><p>* Snail_____ got faster and faster as the race went on.</p><p>* After 4 hours Snail B had gone _____inches.</p><p>* It took snail C _____hours to cover 50 inches.</p><p>* Snails ____&____ traveled at constant speed.</p><p>* Snail_____ had the fastest constant speed.</p><p>* What was the average speed of snail C?</p><p>* (show your work below)</p><p>A few questions for you:</p><p>* What does the horizontal line for car C indicate?</p><p>* Which car(s) is/are accelerating? How do you know?</p><p>* Which car(s) is/are traveling at constant speed?</p><p>* Which car won the race?</p><p>* How do you know which car won the race?</p><p>* What is the average speed of each car in the race?</p><p>Quiz</p><p>* 1.The graph used to graph speed is called a ______-______graph.</p><p>* 2. Speed that does not change is called ______speed. * 3. Speed that fluctuates is called ______speed.</p><p>* 4. The shape of a line on a distance-time graph for constant speed is a ______, ______line.</p><p>* 5. The > the slope the ______the constant speed.</p><p>* 6. On a distance time graph a line that is horizontal indicates ______.</p><p>* 7. The formula for calculating speed is ______=______</p><p>* 8. Speed in a given direction is called ______.</p><p>* 9. The rate of change in velocity is called______.</p>