Faster than gravity?
Usain Bolt ran 100m in 9.81 seconds in the 2016 Olympic Finals. The gravitational pull of the earth is 9.81 metres per second per second.
Was Usain Bolt's average acceleration larger or smaller than that of gravity?
Assume that the figures given are exact .
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1 solution
use S=ut +({1/2}) a t 2 take u=0, put in the values
a/g = 200/944 that means acceleration of usian bolt is only 0.21g