1. Accelerated Motion

2. Changing Velocity In each of the diagrams below, 5 pictures were taken at intervals of 1 second. Can you describe what is going on in each?

3. Acceleration Acceleration: The rate at which an objects velocity changes. Instantaneous Acceleration: Found by drawing a tangent line, then finding the slope of the tangent, on the velocity vs. time graph at the point interested in.

4. Find the acceleration of the object represented in the graph below. Acceleration =

5. Example 1 Refer to the graph below. Find the average acceleration of the train during the following intervals. A)0.0 to 5.0 sec B)15.0 to 20.0 sec C)0.0 to 40.0 sec

6. Example 2 Describe the motion of the dog in the graph below.

7. #5 on page 61 of your book

8. Direction of Acceleration Which way are each of the objects accelerating? 1) 2) 3) 4)

9. Describing Velocity vs. Time Graphs Describe the motion in objects A through E.

10. Relating Position, Velocity, and Acceleration. From the graph given, draw the other two corresponding graphs. Assume that initial position and velocity equal zero when needed.

12. Example 3

13. Example

15. A top fuel dragster can run the quarter mile in 4.45 seconds. What is his acceleration? If gravity, g, accelerates objects at 9.8 m/s 2, how many g’s is this?

16. You are in a Top Fuel Drag Racer doing a constant 530 km/h. A)How fast is this in mph? B) You see a deer on the road 300 m in front of you and you poop your pants / pray. It takes you 0.45 seconds to react and deploy your 5 parachute system. You experience a deceleration of 5 G, and your retinas detach. Will you blindly hit the deer?

17. Mr. Heer is at a stop light. A speeding Tony is traveling at a constant speed of 50.0 m/s when he passes a standing still Heer. Little does Tony know, Mr. Heer is packing nitrous. Mr. Heer accelerates at 10.0 m/s 2. How fast will Mr. Heer be going when Tony is eating his dust?

18. Free Fall You throw a ball downward with a velocity of 5.0 m/s. A)How fast is it going 3.0 seconds later? B)How far has it gone? C)What if you threw it upwards with a speed of 5 m/s, how fast would it be going after 3 seconds?