PH-1520

Resultant force and F = ma

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

A 2.0 kg block is pulled horizontally on a rough floor by a constant force of 14 N. The frictional force on the block is 4.0 N. Using Newton’s second law, what is the acceleration of the block?

$5.0\,\text{m/s}^2$
$7.0\,\text{m/s}^2$
$3.0\,\text{m/s}^2$
$2.0\,\text{m/s}^2$

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