A body starts from rest with a uniform acceleration of 2 m/ s2 for 10 sec. It moves with constant speed for 30 sec, then decelerates by 4 m / s2 to zero. What is the distance covered by the body ?

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750 m

850 m

600 m

None of these

answer is A.

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Detailed Solution

Vmax = 20 m/ sDistance travelled = 12×2×100+20×30+2022×4= 100 + 600 + 50 = 750 m.

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