Question

In $S = a + bt + ct^{2}$. $S$ is measured in metres and $t$ in

seconds. The unit of $c$ is

• A. None
• B. $m$
• C. $ms^{- 1}$
• D. $ms^{- 2}$

Answer 1

Answer: (D)

$ms^{- 2}$

Answer 2

$ct^{2}$ must have dimensions of $L$

$\Rightarrow$ $c$ must have dimensions of $L/T^{2}$ i.e. $LT^{- 2}$.