A plane mirror is mounted on the back of a truck which is traveling 20m/s. how fast does the image of a man standing in the road behind the truck seem to be moving away from him

20m/s

Explanation:

the distance of the image formed in the mirror is the same distance from which the object is

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

the area between the graph and the t axis