Question

A vertically placed mirror is falling down. Just before hitting the ground, the mirror has a velocity of $3\text{m/s}$. A man is running away from the mirror at $3\text{m/s}$. What is the speed of the image?

• A. $0\text{m/s}$
• B. $3\text{m/s}$
• C. $6\text{m/s}$
• D. $3\sqrt{2}\text{m/s}$

Answer 1

The correct option is B $3\text{m/s}$

The vertical mirror is falling down, so its speed is irrelevant.
Since speed of the person is $3\text{m/s}$, so is the image's speed $3\text{m/s}$.