Velocity+and+Acceleration

Velocity and Acceleration WebQuest 2. When an object is turning a corner, what direction is the acceleration? 3. When an object is moving to the left and slowing down, what direction is the acceleration?** Watch the [|Racing Carts animation]:
 * Part I. ****Direction of Velocity and Acceleration **
 * Watch the [|Hot Wheels car animation] **
 * 1. When an object is speeding up to the right, what direction is the acceleration?
 * 4. **** Accelerating objects have a changing velocity - either due to a speed change or a direction change. Considering east as a positive direction and west as negative direction, complete the table below by writing the direction of each vector as an arrow. **
 * Situation ||  Velocity  ||  Acceleration  ||
 * Speeding up going east ||   ||   ||
 * Speeding up going west ||   ||   ||
 * Slowing down going east ||   ||   ||
 * Slowing down going west ||   ||   ||
 * 

5. Explain why the blue skier made it to the finish line first.

Part II. ****Constant Velocity versus Acceleration **.

[|**Constant Velocity**] [|**Uniform Acceleration**]
 * Watch the animations:**
 * 6. Write a mathematical description of each position-time graph. **
 * 7. What variable is obtained by calculating the slope of a: **
 * a. position-time graph?**
 * b. velocity-time graph?**

 **a. ****Match the appropriate line to the particular color of car. **  **b. **** Plot a corresponding Velocity-Time graph for each car. **
 * Watch the [|Car Animation:] **
 * 8. ****Which car or cars (red, green, and/or blue) are undergoing an acceleration? How can you tell the difference in motion? **
 * <span style="COLOR: #330099; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">9. ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">Look at the Position-Time graphs of each of the cars. **


 * <span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">Watch [|The Stoplight] **
 * <span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">A ****<span style="COLOR: #000066; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">blue car ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">moving at a constant speed of 10 m/s passes a red car that is at rest. This occurs at a stoplight the moment that the light turns green. **
 * <span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">The ****<span style="COLOR: #9e0704; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">red car ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"> accelerates from rest at 4 m/s/s for three seconds and then maintains a constant speed. **
 * <span style="COLOR: #330099; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">10. ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"> Calculate at what speed does the ****<span style="COLOR: #9e0704; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">red car ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"> travel after 3 seconds? **
 * <span style="COLOR: #330099; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">11. ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"> Plot a velocity-time graph for both cars for an interval of 12 seconds. **
 * <span style="COLOR: #330099; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">12. ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"> What information can be found by calculating the area under the lines? **
 * <span style="COLOR: #330099; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">13. ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt"> Using the graphs, find the displacement of each individual car after 10 ** **<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">seconds. Trace the areas on the graph clearly and show all your work! **
 * <span style="COLOR: #330099; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">14. ****<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">When lines on a velocity-time graph intersect, does this mean that the ** **<span style="COLOR: black; FONT-FAMILY: 'Helvetica','sans-serif'; mso-fareast-font-family: 'Times New Roman'; mso-bidi-font-size: 12.0pt">two cars are passing by each other? If not, what does it mean? **