Objects a and b both start at rest. they both accelerate at the same rate. however, object a accelerates for twice the time as object b. what is the final speed of object a compared to that of object b?

If they both start from rest, and accelerate at the same rate, and A accelerates for twice as long as B does, then A ends up with TWICE the speed that B has.

v 154.9= 0.9 length length s little over 154.9cm

d. air pressure decreases as altitude increases.