The position of a particle moving along the y axis has a position given by
?
?
Is there any time interval during which the particle is not moving?
A. Yes, from 0.60 s to 1.00 s.
B. Yes, from 0.795 s to 0.805 s.
C. Yes, at the time t = 0.80 s.
D. No, the velocity is never zero.
E. No, an instant is not the same as a time interval.
Answer: E
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