Per NCERT Example 2.1 (x = a + bt², b = 2.5 m/s²), what is the velocity at t = 2.0 s?
A5.0 m/s
B20 m/s
C2.5 m/s
D10 m/s (= 2 × 2.5 × 2.0)
Answer & Solution
Correct answer: D. 10 m/s (= 2 × 2.5 × 2.0)
Per NCERT Example 2.1, v = 2bt = 2 × 2.5 × 2 = 10 m/s.
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