# Problem 1-15| General Principles| Engineering Mechanics: Statics| RC Hibbeler

#### Determine the mass of an object that has a weight of (a) 20 mN, (b) 150 kN, and (c) 60 MN. Express the answer to three significant figures.

Solution:

a) $m=\frac{W}{g}=\frac{20\left(10^{-3}\right)kg\cdot m/s^2}{9.81\:m/s^2}=2.04\:g$

b) $m=\frac{W}{g}=\frac{150\left(10^3\right)kg\cdot m/s^2}{9.81\:m/s^2}=15.3\:Mg$

c) $m=\frac{W}{g}=\frac{60\left(10^6\right)kg\cdot m/s^2}{9.81\:m/s^2}=6.12\:Gg$