Graph represents motion of an object along X–axis for 80s

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the magnitude of displacement of the object for entire journey is 5 m

average speed for entire journey is 0.05 m/s

the distance the object travelled 9 m

speed of object at t = 20 s is 0.1 m/s

answer is A, B, C.

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Detailed Solution

$x_{i n i t i a l} = 0; x_{f i n a l} = 5$
Displacement = $x_{f i n a l} - x_{i n i t i a l} = 5 m$
Distance travelled = 7 + 9 = 9 m
$v = s l o p e o f x - t g r a p h = \frac{2}{20} = 0.1 m / s$

$< v > = \frac{t o t a l d i s \tan c e}{t o t a l t i m e} = \frac{9}{80} = 0.11 m / s$

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