Question

physics 1 unit 2 practice test
12 of 22
which of the following formulas should be used to calculate the boxs weight?
$f_g = mg$
$f_{net} = f_a - f_f$
$a = f div m$
$f_{fk} = (mu_{fk})(f_n)$

Explanation:

Weight is a force due to gravity. The formula for gravitational force (\(F_g\)) is \(F_g = mg\), where \(m\) is mass and \(g\) is acceleration due to gravity. The other formulas: \(F_{NET}=F_A - F_F\) is for net force (difference between applied and frictional forces), \(a = F\div m\) is Newton's second law (acceleration as force - mass ratio), and \(F_{FK}=(\mu_{FK})(F_N)\) is for kinetic frictional force (product of kinetic friction coefficient and normal force). Only \(F_g = mg\) calculates weight.

Answer:

\(F_g = mg\)