alleryStart learning →A body starts from rest and accelerates uniformly at 2 m per second squared for 5 seconds. Its final velocity is:
A5 m per second
B10 m per second
C7 m per second
D25 m per second
Answer & Solution
Correct answer: B. 10 m per second
1. Use the first equation of uniformly accelerated motion: v = u + at.
2. Given u = 0 (starts from rest), a = 2 m per second squared, t = 5 s.
3. Substitute: v = 0 + 2 × 5.
4. v = 10 m per second.
5. Option D mistakes the formula for s = ½at² and computes displacement instead.
_Source: Selina Concise Physics ICSE Class 9, Ch 2 'Motion in One Dimension' (aplustopper.com extract)_
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