Use the position function s(t) = –4.9t2 + 700, which gives the height (in meters) of an object that has fallen for t seconds from a height of 700 meters. the velocity at time t = a seconds is given by the following. $ \displaystyle{\lim_{t \rightarrow a}} \text{ }\dfrac{s(a) - s(t)}{a - t} $ find the velocity of the object when t = 3.

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?