alleryAn object starts from rest and attains a speed of 5 m/s in 2 seconds. What is its acceleration?
A2 m/s²
B1 m/s²
C0.4 m/s²
D2.5 m/s²
Answer & Solution
Correct answer: D. 2.5 m/s²
1. Acceleration a = (v - u) / t, with u = 0, v = 5 m/s, t = 2 s.
2. a = (5 - 0) / 2 = 5/2.
3. a = 2.5 m/s².
_Source: RRB Group D CEN-02/2018 PYQ, Q.6._
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