avg speed 250 How far in meters would the feather fall in 4

avg speed= .250
How far in meters would the feather fall in 4 seconds if it were dropped in a vacuum at the Earth\'s surface?
a. 1.00 b.9.80 c. 19.6 d. 39.2 e. 78.4

Solution

If its avg speed is .250, it will fall 1.0 in for seconds, assuming the units are per second.
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4.9 m/sec/sec is commonly used for gravitational acceleration on Earth.
s = 4.9*t^2 = 4.9*16
s = 78.4 meters