Velocity of a ball?

Question

If a ball is dropped from a hieight of 256 ft. then the formula v(t)= -32t expresses its velocity v(t) in feet per secon as a function of time t in seconds. Find v(0), the velocity of the ball at time t = 0. Then find v(4).

Answer 1

v(0) = 0.

v(4) = - 4 * 32 = - 128 ft/sec.