PH-1349

Resultant force and F = ma

Physics · Secondary 4 · Medium · Resultant force and F = ma

A 5.0 kg box is pulled along a horizontal floor by a horizontal force of 18 N. The frictional force opposing the motion is 8.0 N. What is the acceleration of the box?

Apply Newton’s second law with the resultant force.

$2.0\,\text{m/s}^2$
$0.50\,\text{m/s}^2$
$1.0\,\text{m/s}^2$
$3.6\,\text{m/s}^2$

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