Question

The weight of a piece of metal is 225 lbf at a location where gravitational acceleration is 31 ft/s2 . Find the weight of the metal in lbf and the mass of the metal in lbm if it will be placed on the surface of the moon where g is 5.5 ft/s2 .

Answer 1

$F = m\times a$

$m =\frac{F}{a} =\frac{225}{31} = 7.25 lbm$

mass of the metal = 7.25 lbm

Weight of metal

$W =m \times g = 7.25 \times 5.5 = 39.875$ lbf