Problem 1-16| General Principles| Engineering Mechanics: Statics| RC Hibbeler

What is the weight in newtons of an object that has a mass of: (a) 10 kg, (b) 0.5 g, and (c) 4.50 Mg? Express the result to three significant figures. Use an appropriate prefix.

Solution:

a) $W=\left(9.81\:m/s^2\right)\left(10\:kg\right)=98.1\:N$

b) $W=\left(9.81\:m/s^2\right)\left(0.5\:g\right)\left(\frac{10^{-3}\:kg}{1\:g}\right)=4.90\:mN$

c) $W=\left(9.81\:m/s^2\right)\left(4.5\:Mg\right)\left(\frac{10^3\:kg}{1\:Mg}\right)=44.1\:kN$