Acceleration-time graph is given. If initial velocity is 5 , ,m/s… - Vidyadip

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

$\Rightarrow \,\,v\,-\,5\,\,=\,\,\frac {1}{2}\,\,\times \,\,10\,\,\times \,\,2\,\,\Rightarrow \,\,v\,=\,15\,\,m/s$

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