You and Mae are in free-float frames.Mae has just passed you,traveling at a speed of 60 km/hr.You throw a ball toward her at a speed of 60 km/hr.What will Mae see the ball doing?
A)She'll see the ball coming toward her at 60 km/hr.
B)The ball will be stationary,floating freely in her own reference frame.
C)She'll see the ball moving away from her at 60 km/hr.
D)She'll see the ball coming toward her at 120 km/hr.

Question

Quizplus · Accepted Answer

In Mae's reference frame, the ball is thrown at the same speed she is moving relative to you, so it appears stationary to her. This is because velocities are relative, and in her frame, the ball's velocity cancels out her own velocity relative to you.

You and Mae Are in Free-Float Frames