F: These are the problems that were on the board yesterday. Nothing new here.
1. Consider a ball kicked off a 30-m tall cliff with an initial speed of 20 m/s. How long does it take to hit the ground below? (The quadratic formula, if you know how to use it, makes this problem a bit easier - or at least, then it can be done in step.)
2. The drowsy cat. A cat sits on a window sill (2-m in height). It notices that a flowerpot sails up and past the top of the window (still moving up), then down and past the cat again (still moving down). The total amount of time that the flowerpot is in sight is 1/2 a second (1/4 up and 1/4 down). How high ABOVE the top of the window frame does the flowerpot travel? (Yes, this is a tricky problem.)
3. Bonus, slightly less tricky problem. A ball falls from rest. It takes 1 second to fall the second half of its path downward. From what height was it released and how long was it in air?
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