Monday, February 2, 2009

Look Out Below

Its been a long time....

Today, we reviewed the answers to Look Out Below

1. 1 sec = 50 ft/sec; 2 secs = 70 ft/sec

2. Avg speed is 50 ft/sec (How did we get this?)

3. Travel 100 feet in 2 secs (Can you use the area model to get this?)

4. 3.2 secs to fall 200 feet (Can you use the area model to get this? -OR- Can you use the equation below to get this answer?)

5. h(t) = 200 - 10t^2 - 30t. This is derived from the physics formula that some students remember: displacement = 0.5*a*t^2 + vi*t

The top of this page has more information on the formulas we are interested in.

Here is a site that can help with the physics concepts. We also proved some of them in the assignment "FreeFall".

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