Physics - NLM Question with Solution | TestHub

Mass of the person$M=80$kg

Mass of the parachute$m=5$kg

$\therefore$Total mass of the system$=M+m=\mathrm{85 }$kg

Downward acceleration$a=2.8 {\mathrm{m }\mathrm{s}}^{-2}$

Let upward force$=F$

Applying Newton's II law of motion to this system

$F=\left(m+M\right)g-\left(m+M\right)a$

$\mathrm{o}\mathrm{r}\mathrm{ }\mathrm{ }F=\left(m+M\right)\left(g-a\right)$

$F=85\left(9.8-\mathrm{2.8 }\right)\mathrm{N}$

$=85\times 7\mathrm{ }\mathrm{N}$

$F=595 \mathrm{N}$