An object starts from rest and accelerates uniformly at 5 m/s² for 6 s. What is its final speed?

A) 15 m/s

B) 45 m/s

C) 30 m/s

D) 60 m/s

Answer: C

Explanation: Use final speed = acceleration × time from rest for the stated idealized conditions. Substitution gives 5 × 6 = 30 m/s.