alleryA $2\,\text{kg}$ block is accelerated downward at $2\,\text{m s}^{-2}$. Taking $g = 10\,\text{m s}^{-2}$, what is the tension in the string?
A$16\,\text{N}$
B$20\,\text{N}$
C$24\,\text{N}$
D$40\,\text{N}$
Answer & Solution
Correct answer: A. $16\,\text{N}$
For downward acceleration, $mg - T = ma$.
So $T = m(g-a) = 2(10-2) = 16\,\text{N}$.
**Therefore option A is correct.**
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