Martha was leaning out of the window on the second floor of

Martha was leaning out of the window on the second floor of her house and speaking to Steve. Suddenly, her glasses slipped from her nose. The glasses hit the ground in 2.2 seconds. Neglecting the effects of air resistance, answer the questions below.
A. What is the height of the window from the ground?
B. What was the impact velocity of the glasses?

Solution

You didn\'t specify units. I\'ll use feet and seconds.
B. v = at
v = 32 ft/sec/sec * 2.2 seconds
v at impact = 70.4 ft/second
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A. s = at^2/2
s = 16*2.2^2
s = 77.44 feet