A particle is constrained to move on a straight line path. It returns to the starting point afte...

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A particle is constrained to move on a straight line path. It returns to the starting point after \( 10 \mathrm{sec} \). The total distance covered by the particle during this time is \( 30 \mathrm{~m} \). Which of the following statements about the motion of the particle is false
[CBSE PMT 2000; AFMC 2001]
(a) Displacement of the particle is zero
(b) Average speed of the particle is \( 3 \mathrm{~m} / \mathrm{s} \)
(c) Displacement of the particle is \( 30 \mathrm{~m} \)
(d) Both (a) and (b)
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