I. A model rocket is launched straight upwards with an initial speed of 50.0 m/s. It accelerates with a constant upward acceleration of 2.00 m/s2 until it's engines stop at an altitude of 150 m.(adsbygoogle = window.adsbygoogle || []).push({});

I found a thread with an extremely similar question, but the only reply that showed up was a formula, which didn't list the meanings of the variables. I'm pretty sure I could solve this if someone could help me to fill out a data table like this:

Initial Velocity: 50.0 m/s

Final Velocity: 0.0 m/s?

Change in Velocity:

Average Velocity:

Acceleration:

Distance: x

Time:

I only need enough variables to solve, and even then just a springboard to give me the right direction. I'm getting confused by the rocket accelerating to a certain point and then coasting past.

II. Two students are on a balcony 19.6 m above the street. One student throws aball vertically downward at 14.7 m/s; at the same instant, the pther student throws a ball vertically upward at the same speed. What is the difference of the two balls' time in the ai, and what is the velocity of each ball as it hits the ground?

Part of what is confusing me here is the vertically downward phrase, and how that effects the acceleratin (assuming -9.8 m/s2 is used here)

Data Table

Initial Velocity: -14.7 m/s (B1), 14.7 m/s (B2)

Final Velocity:

Change in Velocity:

Average velocity:

Acceleration: -9.8 m/s2

Distance: 19.6 m

Time

Again, just need to know enough variables to use an equation and/or a step in the right direction.

Thanks!

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# Homework Help: AP Physics - Freely Falling Objects

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