GRE Physics Subject Test Practice Questions - Graduate Record Examination Physics Subject Test Exam

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A particle moves in one dimension with position x(t) = t³ − 6t² + 9t (meters, t in seconds). At what times is the particle momentarily at rest?

t = 1 s and t = 3 s t = 2 s only t = 0 s and t = 2 s t = 3 s only

Correct Answer:

t = 1 s and t = 3 s

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