Question

If u is the velocity of the object w.r.t. ground and m be the velocity of the mirror w.r.t ground. Find the velocity of the image w.r.t. object ? Here w.r.t means "with respect to".

Answer 1

If u is the velocity of object w.r.t ground and m be the velocity of mirror w.r.t ground then we can write the components as:

u= (u)i + (u)j + (u)k

m = (m)i + (m)j + (m)k

Then the velocity of the image w.r.t. ground will be

v_image= (-u + 2m)i + (u)j + (u)k