Question

A man weighs 130.4N on moon. If acceleration due to gravity on the moon is 1.63m/s² find mass of man and his weight on earth

Answer 1

$$\begin{gathered} \mathrm{Mass}\mathrm{of}\mathrm{the}\mathrm{man}: \\ \mathrm{m}=\frac{{\mathrm{W}}_{\mathrm{moon}}}{{\mathrm{g}}_{\mathrm{moon}}} \\ =\frac{130.4}{1.64} \\ \mathbf{}\mathbf{}\mathbf{}\mathbf{=}\mathbf{79}\mathbf{.}\mathbf{5}\mathbf{}\mathbf{kg} \\ \mathrm{Weight}\mathrm{on}\mathrm{the}\mathrm{earth}: \\ \mathrm{W}={\mathrm{mg}}_{\mathrm{earth}} \\ =79.5\times 9.8 \\ \mathbf{}\mathbf{}\mathbf{=}\mathbf{779}\mathbf{.}\mathbf{1}\mathbf{}\mathbf{N} \end{gathered}$$