free body diagram

Question

A 10 kg block on frictionless surface is pulled by 40 N. Acceleration is:

RankGuru · Accepted Answer

According to Newton's Second Law of Motion, the acceleration $\vec{a}$ of an object is directly proportional to the net force $\vec{F}_{net}$ acting on it and inversely proportional to its mass $m$:
$\vec{F}_{net} = m \vec{a} \implies \vec{a} = \frac{\vec{F}_{net}}{m}$
Given:
- $F_{net} = 40 	ext{ N}$ (since the surface is frictionless, there is no opposing force)
- $m = 10 	ext{ kg}$
Substituting the values:
$a = \frac{40 	ext{ N}}{10 	ext{ kg}} = 4 	ext{ m/s}^2$.

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