- #1

stangeroo

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We have to solve this problem, but also do a write-up on it similar to how the textbook gives example problems. Here is the problem:

Your school science club has devised a special event for homecoming. You've attached a rocket to the rear of a small car. The rocket provides a constant acceleratoin for 9 seconds. As the rocket shuts off, a parachute opens which slows the car at a rate of 5m?s^2. The car passes the judges' box 990 meters from the starting line 12 seconds after you fire the rocket. What is the car's speed as it passes the judges?

So after drawing a pictorial diagram I came up with the following info.

[tex]V_0[/tex]=0

[tex]X_0[/tex]=0

[tex]T_0[/tex]=0

A=?

[tex]V_1[/tex]=?

[tex]X_1[/tex]=?

[tex]T_1[/tex]=9

A=-5

[tex]V_2[/tex]=?(the main thing youre trying to find)

[tex]X_2[/tex]=990

[tex]T_2[/tex]=12

I figure you need to find all the info out about the middle point, when the rocket shuts off and the parachute opens. And it seems like you need to work from the end backword, but I don't know how. Any help would be greatly appreciated

Your school science club has devised a special event for homecoming. You've attached a rocket to the rear of a small car. The rocket provides a constant acceleratoin for 9 seconds. As the rocket shuts off, a parachute opens which slows the car at a rate of 5m?s^2. The car passes the judges' box 990 meters from the starting line 12 seconds after you fire the rocket. What is the car's speed as it passes the judges?

So after drawing a pictorial diagram I came up with the following info.

[tex]V_0[/tex]=0

[tex]X_0[/tex]=0

[tex]T_0[/tex]=0

A=?

[tex]V_1[/tex]=?

[tex]X_1[/tex]=?

[tex]T_1[/tex]=9

A=-5

[tex]V_2[/tex]=?(the main thing youre trying to find)

[tex]X_2[/tex]=990

[tex]T_2[/tex]=12

I figure you need to find all the info out about the middle point, when the rocket shuts off and the parachute opens. And it seems like you need to work from the end backword, but I don't know how. Any help would be greatly appreciated

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