2. bianca stands on top of a tall building. she drops a 3 kg rock from rest. ignoring air resistance, what will be the
velocity of the rock after 3 s?
a. -10 m/s
b. -30 m/s
-0.33 m/s
+10m/s

Aparticle initially located at the origin has an acceleration of = 2.00ĵ m/s2 and an initial velocity of i = 8.00î m/s. find (a) the vector position of the particle at any time t (where t is measured in seconds), (b) the velocity of the particle at any time t, (c) the position of the particle at t = 7.00 s, and (d) the speed of the particle at t = 7.00