alleryA train starts from rest (u = 0) and accelerates uniformly at a = 2 m/s² for t = 10 s. The distance it covers is:
A20 m, using s = ut + ½at² with u = 0
B100 m, using s = ½at² for u = 0 case
C200 m, using s = ½at² with t squared as 100
D50 m, using s = (a × t) / 2 incorrectly
Answer & Solution
Correct answer: B. 100 m, using s = ½at² for u = 0 case
From rest (u = 0), s = ½at² = ½ × 2 × 10² = ½ × 2 × 100 = 100 m.
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