PH-140

Resultant force and F = ma

Physics · Secondary 3 · Medium · Resultant force and F = ma

A metal block of mass 4.0 kg is pulled along a horizontal floor by a constant horizontal force of 28 N. The frictional force on the block is 8.0 N. What is the acceleration of the block?

$5.0\,\text{m s}^{-2}$
$7.0\,\text{m s}^{-2}$
$3.0\,\text{m s}^{-2}$
$0.50\,\text{m s}^{-2}$

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