A woman holds a mirror stationary and perfectly vertical as a boy runs toward it

ID: 1455327 • Letter: A

Question

A woman holds a mirror stationary and perfectly vertical as a boy runs toward it at a speed of 3.5 m/s .

In her reference frame, what does the woman observe for the speed at which the boy's reflection moves toward the mirror?

In her reference frame, what does the woman observe for the speed at which the boy moves toward the mirror?

In the reference frame of the boy, what does he observe for the speed at which the woman moves toward him?

In the reference frame of the boy, what does he observe for the speed at which his reflection moves toward him?

1) 3.5 m/s (because for a plane mirror, image distance = object distance)

2) 3.5 m/s

3) 3.5 m/s

4) 7 m/s (3.5 + 3.5 = 7 m/s)

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