Practice question
Question
A particle starts from rest with a constant acceleration of (4 î + 2 ĵ) m/s². What is its speed after 5 s?
Explanation
Velocity v = v₀ + at, where v₀ = 0. As per NCERT Chapter 3, equations v=u+at, s=ut+½at², v²=u²+2as describe uniformly accelerated motion. Applying correct signs and units gives 10 m/s as the result, so option B is correct.
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