Answer:
3. 3.5 s
Explanation:
The position of traveller A is given by the equation:

where
is the acceleration of A
t is the time measured from when A started the motion
The position of traveller B instead is given by

where a (acceleration) is the same as traveller A, and

is B's initial velocity. We can verify that the formula is correct by substituting t=2, and we get
, which means that B starts its motion 2 seconds later.
Traveller B overtakes traveller A when the two positions are the same, so:

B) Applied and gravitational forces
<span>EP (potential energy) = mgy -> (59)(9.8)(-5) = -2,891
EP + EK (kinetic energy) = 0; but rearranging it for EK makes it EK = -EP, such that EK = 2891 when plugged in.
EK = 0.5mv^2, but can also be v = sqrt(2EK/m).
Plugging that in for sqrt((2 * 2891)/59), we get 9.9 m/s^2 with respect to significant figures.</span>