Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Like this presentation? Why not share!

- Average Speed Sample Problems by Jan Parker 10866 views
- Average Speed Notes by Jan Parker 1522 views
- Motion speed velocity_ ppt. by ratnumchai 60572 views
- Moving average method maths ppt by Abhishek Mahto 11020 views
- Constant vs Average speed by ismcook 5793 views
- Speed, time, distance by tracyconover 2584 views

2,111 views

Published on

Class Notes from Aug 24, 2011

No Downloads

Total views

2,111

On SlideShare

0

From Embeds

0

Number of Embeds

48

Shares

0

Downloads

0

Comments

0

Likes

1

No embeds

No notes for slide

- 1. Good Morning!<br />Today we will:<br />review distance v time graphs as a model for motion<br />learn to calculate average speed<br />Please do NOW:<br />get a textbook, your lab book & your spiral<br />get out something to write with<br />
- 2. Warm-Up<br />Draw the following graph in your lab book (include labels) and explain (in words) the motion it depicts<br />
- 3. Modeling Speed: Equations<br />average speed can be found using the equation <br />sav=<br />where sav = average speed<br />Δd = change in distance<br />Δt = change in time<br />Δd<br />Δt<br />
- 4. Modeling Speed: Equations<br />Sample Problem: If you drive a distance of 400 miles in 8 hours, what is your average speed?<br />
- 5. Average speed<br />An average of 50 mi/h does not tell you your fastest speed or your slowest speed.<br />It does tell you that over a certain amount of time, you covered a specific distance<br />
- 6. Average Speed<br />For instance, you probably weren’t traveling at a speed of 50 mi/h in your neighborhood, and you stopped at traffic lights, and on the freeway, you probably traveled faster than 50 mi/h.<br />
- 7. Average Speed<br />average speed: total distance traveled in a specific amount of time<br />instantaneous speed: the speedometer reading at any given instant<br />constant speed: speed that does not change over a period of time<br />
- 8. Equations<br />The formula for average speed ( sav = Δd/Δt) can also be used to solve for distance or time.<br />
- 9. Sample Problem<br />You are traveling at 50 ft/s (about 35 mph) and your reaction time is 0.2 s. Calculate the distance you travel during your reaction time.<br />
- 10. Equation Solving Strategy<br />In physics, when you do calculations it is very important to pay attention to the units you are using.<br />Always carry your units through the problem!<br />ALWAYS. REALLY. I’M NOT KIDDING.<br />
- 11. Sample Problem #3<br />In an automobile collision, it was determined that a car traveled 150 feet before the brakes were applied.<br />If the car was traveling the speed limit of 40 mi/h (60 ft/s), what was the driver’s reaction time?<br />

No public clipboards found for this slide

×
### Save the most important slides with Clipping

Clipping is a handy way to collect and organize the most important slides from a presentation. You can keep your great finds in clipboards organized around topics.

Be the first to comment