A balloon inflated with helium gas $($density $=0\mathrm{.}40$ kg$/$m$3)$ has a volume of

$8103$ m$3.$ Assume the density of air is $1\mathrm{.}3$ kg$/$m$3.$

a$)$ What is the magnitude of the buoyant force exerted on the balloon? $0\mathrm{.}102$ N

b$)$ What is the acceleration of the balloon? $($set upward $(+)$ and down $(-))$ Magnitude and

Direction $(+$or $-)!$

$+22\mathrm{.}1$ m$/$s$2$