K When an object is dropped on a certain earth-like planet, the distance it falls in t seconds, assuming that air resistance is negligible, is given by s(t)=1912 where s(t) is in feet. Suppose that a medic's reflex hammer is dropped from a hovering helicopter. Find (a) how far the hammer falls in 2 sec, (b) how fast the hammer is traveling 2 sec after being dropped, and (c) the hammer's acceleration after it has been falling for 2 sec. (a) The hammer falls 76 feet in 2 seconds. (Simplify your answer.) (b) The hammer is traveling ft/sec 2 seconds after being dropped. (Simplify your answer.) (c) The hammer's acceleration is ft/sec/sec after it has been falling for 2 sec. (Simplify your answer.)