PH-1439

Resultant force and F = ma

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

A 3.0 kg block is pushed across a horizontal floor by a constant horizontal force of 9.0 N. The frictional force on the block is 3.0 N and remains constant. What is the acceleration of the block?

$1.0\,\text{m s}^{-2}$
$2.0\,\text{m s}^{-2}$
$3.0\,\text{m s}^{-2}$
$4.0\,\text{m s}^{-2}$

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