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If a net force of $50\,\text{N}$ acts on a combined mass of $20\,\text{kg}$, what is the acceleration?
A$1\,\text{m s}^{-2}$
B$2\,\text{m s}^{-2}$
C$2.5\,\text{m s}^{-2}$
D$5\,\text{m s}^{-2}$
Answer & Solution
Correct answer: C. $2.5\,\text{m s}^{-2}$
Using $a = F/m$, we get $a = 50/20 = 2.5\,\text{m s}^{-2}$. Thus option C is correct.