A particle moves along straight line according to law s = t…

Physics Motion in a Straight Line Position, Path Length and Displacement MCQ (Single Correct)

A particle moves along straight line according to law s = t 3 – 5t 2 + 6t m where 't' is time in sec and s is displacement in metre.

Direction of velocity change twice from t = 0 to t = 4 sec.

Direction of acceleration change twice from t = 0 to t = 5 sec.

Speed increases continuously from t = 0 to t = 4 sec.

Speed increases continuously after t = 4 sec.

Text Solution

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The correct answer is:

CHECK THE SOLUTION

(a, d) s = t 3 – 5t 2 + 6t

v = 3t 2 – 10t + 6 m/s

a = 6t – 10 m/s 2

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