Question

A student who is standing 0.5 meters from a plane mirror moves at a velocity of 0.75 meters per second for 3 seconds away from the mirror. How much further is the student from her image than when she first started moving?

Answer 1

Given,

Initial distance (from mirror)= 0.5 m

Initial distance (from image)= 2*0.5= 1 m

Speed (going away)= 0.75 m/s

Time taken (going away)= 3 s

So,

Total distance covered= 0.75*3

= 2.25 m

Now,

New distance ( from mirror)= 0.5+2.25

= 2.75 m

New distance (from image)= 2*2.75

= 5.50 m= 5.5 m

Hope this helps you!