<Dd> v (t) (\ displaystyle v (t) \,) is the vertical velocity with respect to time (m / s). </Dd> <Dd> y 0 (\ displaystyle y_ (0) \,) is the initial altitude (m). </Dd> <Dd> y (t) (\ displaystyle y (t) \,) is the altitude with respect to time (m). </Dd> <Dd> t (\ displaystyle t \,) is time elapsed (s). </Dd>

Who said all objects fall at the same rate