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Flat Mirror Help As shown below, a ninja assassin hired by Physics 102 students

ID: 2301422 • Letter: F

Question

Flat Mirror Help

As shown below, a ninja assassin hired by Physics 102 students is trying to sneak up on Professor DeMarco while he admires his hair in a mirror. The ninja is 10 m from the mirror, and Professor DeMarco is 1 m from the mirror. Professor DeMarco's eyes are 0.25 m below the top of the mirror. What is the minimum distance y that the ninja has to be above the top of the mirror so that Prof. DeMarco cannot see him? Professor DeMarco will be able to see the ninja for any height y. If the ninja is v isible in the mirror, what is the horizontal distance between Professor DeMarco and the image he sees of the ninja in the mirror?

Explanation / Answer

8)e

9)c,11m