Question

You are riding your bike and steadily pulling your little brother

Plus
in his red wagon while someone standing still watches you and
your little brother go by. He has a ball, and he throws the ball forward at a
velocity of 2.5 m/s relative to his body while you are pulling the wagon at a
velocity of 4.5 m/s. At what speed does the person who is standing nearby see
the ball go by?

Answer 1

the velocity at which the boy see the ball go by is 7ms-1