Question

29.A train moving with an initial velocity of 50m/s slows down at a rate of 3m/s2 for 10 seconds. What is the final velocity of the train? A.15m/s B. 20m/s C. 50m/s D. 80m/s

Answer 1

Use v = u + at.

u = 50 m/s, a = −3 m/s² (slowing), t = 10 s:

v = 50 + (−3)(10) = 50 − 30 = 20 m/s.

Answer: B. 20 m/s.