Answer:
Vf = Vi + a t fundamental equation
-60 m/s= Vi - 9.8 m/s^2 * 6 sec taking upward direction as positive
Vi =58.8 m/s - 60 m/s = -1.2 m/s so the coin was initially thrown downward
As a check take the downward direction as positive
Vf = 1.2 m/s + 58.8 m/s = 60 m/s
