Answered

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A man stands still on a moving escalator and a woman walks past him in the
same direction as the escalator. To a stationary observer, the man has a
speed of 0.2 m/s and the woman has a speed of 0.5 m/s. From the frame of
reference of the man on the escalator, how fast is the woman walking?
A. 0.2 m/s
B. 0.5 m/s
C. 0.3 m/s
D. 0.7 m/s

Sagot :

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