JAMB Physics 2013 Objective — Question 6

Question 6 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.

A train with an initial velocity of 20ms⁻¹ is subjected to a uniform deceleration of 2m/s². The time required to bring the train to a complete halt is

A. 5s
B. 10sCorrect
C. 20s
D. 40s

Explanation

U=20m/s, V=0 (train comes to rest), a=-2m/s². V=U+at → 0=20+(-2t) → 2t=20 → t=10s.

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