Q.
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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a
750 m
b
850 m
c
600 m
d
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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