(a)[1]
Calculate the weight of the balloon. Show your working.
(b)[2]
Show that the balloon's acceleration is $0.45\,\text{m s}^{-2}$.
(c)[2]
Calculate the balloon's velocity after $8.0\,\text{s}$.
(d)[2]
Calculate the distance covered by the balloon in the first $8.0\,\text{s}$.