1. Ebeneezer the Freezer

2. Rules of This Activity #1 All students must perform all of the work of the activity in their science journals even though you are working in your lab group. #2 When you are sure of your answer, transfer the information onto a large whiteboard. #3 The whiteboard work is to remain on the white board until it is approved.

3. The Problem Ebenezer the Freezer and Hugo A-Go-Go strap Batfink to a rocket. Batfink emits a “BEEP” from his supersonic sonar radar that calculates the displacement the rocket will have at impact with the ground. The rocket is launched at an angle of 30* to the horizontal and fortunately the rocket is faulty and only has a velocity of 39.2 m/s.

4. Working the Problem Draw a Motion Map for the rocket’s motion.

5. Motion Map

6. Working the Problem Resolve the initial velocity into two vector components, one moving the rocket horizontally and one vertically. Show all of your work.

7. Resolve the initial velocity into “x” and “y” components y 33.95 m/s = (Vx) 19.6 m/s 30* x SOH CAH TOA 33.95 m/s SIN 30* = Vy/V (39.2 m/s)(0.5) = (Vy) 19.6 m/s = (Vy) SOH CAH TOA COS 30* = Vx/V (39.2 m/s)(0.866) = (Vx)

8. Working the Problem Calculate the time the rocket will spend in the air.

9. Calculate the time the rocket will spend in the air. Know Want Yf= 0 m t Yo= 0 m Vo = 19.6 m/s a = -9.8 m/s2 General Formula Yf = Yo + Vot + ½ at2 0 = 0 + (19.6 m/s)(t) + ½ (-9.8 m/s2 )(t2) (19.6 m/s)/-4.9 m/s2 = t 4 s = t

10. Working the Problem Calculate the “Xf” distance and the “∆Y” distance that the projectile will travel.

11. Working the Problem Horizontal Distance X = Vx(t) X = (33.9 m/s)(4 s) X = 136 m Vertical Distance Y = Vy(t) + ½ gt2 Y = (19.6 m/s)(2s) – ½ (-9.8 m/s2)(2s2) Y = 19.8 m

12. Working the Problem Construct and complete a Data Table with the first column being time (s), the second column distance (x) and the third distance (y).

13. Construct a Data Table

14. Working the Problem Graph the path of the projectile, distance “Y” over distance “X”.

15. Graph the path of the projectile, distance “∆Y” over distance “X”. 19.6 Distance Y (m) 14.7 33.9 67.8 102 135.8 Distance X (m)

16. You cannot escape my super sonic sonar radar!