A train with an initial velocity of 20ms-1 is subjected to a uniform deceleration of 2m-2. The time required to bring the train to a complete halt is?
-
A.
5s -
B.
10s -
C.
20s -
D.
40s
Correct Answer: Option B
Explanation
t = (frac{v – u}{a}) = (frac{0 – 20}{-2}) = 10s
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