PH-1405

Resultant force and F = ma

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

A 25 kg box is pulled along a horizontal floor by a constant horizontal force of 40 N. The frictional force on the box is 10 N. What is the acceleration of the box?

$0.75\,\text{m s}^{-2}$
$1.2\,\text{m s}^{-2}$
$1.6\,\text{m s}^{-2}$
$4.0\,\text{m s}^{-2}$

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