A rock is thrown straight up with an initial velocity of 17.6 m/s. What time interval elapses between the rock's being thrown and its return to the original launch point? (Acceleration due to gravity is 9.80 m/s2.)
a. 3.60 s
b. 1.80 s
c. 2.70 s
d. 3.06 s
e. 3.96 s
a
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