MCQ
Acceleration-time graph is given. If initial velocity is $5\,\,m/s,$ then velocity after $2$ $seconds$ is.......$m/s$
- A$10$
- ✓$15$
- C$20$
- D$0$
✓
Answer
Correct option: B.
$15$
b
$\Delta v\,\,=\,\,$ area under $(a-t)$ graph
$\Delta v\,\,=\,\,$ area under $(a-t)$ graph
$\Rightarrow \,\,v\,-\,5\,\,=\,\,\frac {1}{2}\,\,\times \,\,10\,\,\times \,\,2\,\,\Rightarrow \,\,v\,=\,15\,\,m/s$
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