Q109 / 270 · NDA 2018 (Phase 2) · General Ability
Consider the following velocity and time graph:
Which one of the following is the value of average acceleration from 8 s to 12 s ?
Which one of the following is the value of average acceleration from 8 s to 12 s ?
- A$8 \mathrm{~m} / \mathrm{s}^2$
- B$12 \mathrm{~m} / \mathrm{s}^2$
- C$2 \mathrm{~m} / \mathrm{s}^2$
- Correct answerD$-1 \mathrm{~m} / \mathrm{s}^2$
Solution
Acceleration is defined as rate of change of velocity with time, hence
$\begin{aligned}
& \mathrm{a}=4-8 / 4 \\
& =-1 \mathrm{~m} / \mathrm{s}^2
\end{aligned}$
Hence, the correct answer is option: 'D'.