Given that a vector has components $(120m,-60\mathrm{.}0m),$ find the magnitude of the vector.

$134$ m

$180$ m

$60\mathrm{.}0$ m

$140$ m

One stone is dropped from the side of a bridge, and a second is dropped from the same place a short time later $($while the first stone is still in the air$).$ What is true about the distance between the stones as a function of time after both have been dropped $($and before either reaches the ground$)?$ Ignore air resistance.

always increases

decreases, and then reaches a constant value

is constant

always decreases

increases, finally reaching a constant value