alleryA net external force of $30\,\text{N}$ acts on a body of mass $10\,\text{kg}$. What is its acceleration?
A$0.3\,\text{m s}^{-2}$
B$3\,\text{m s}^{-2}$
C$30\,\text{m s}^{-2}$
D$300\,\text{m s}^{-2}$
Answer & Solution
Correct answer: B. $3\,\text{m s}^{-2}$
By Newton's second law, $a = F/m = 30/10 = 3\,\text{m s}^{-2}$.
**So the correct option is B.**
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