A particle moves continuously along a line. In every subinterval its average speed equals the magnitude of average velocity. Which statement is possible?
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Question

A particle moves continuously along a line. In every subinterval its average speed equals the magnitude of average velocity. Which statement is possible?

G1 Physics · Accepted Answer

The equality in every subinterval means the motion is monotonic: there is no reversal. However the magnitude of velocity may change with time. Therefore speed can vary while the direction remains unchanged.