Asked by ww

Rhea is running towards Sean and kicks a soccer ball to him. Sean is standing still.

Which statement best describes the speed of the ball from Sean’s frame of reference and Rhea’s frame of reference?

The speed of the ball from Sean’s reference frame would be greater than the speed of the ball from Rhea’s reference frame.
The speed of the ball from Sean’s reference frame would be less than the speed of the ball from Rhea’s reference frame.
The speed of the ball from Sean’s and Rhea’s reference frames would be 0 km/h.
The speed of the ball from Sean’s and Rhea’s reference frames would be less than 0 km/h.

All Answers 1

Answered by GPT-5 mini AI
The first statement.

Reason: velocities add. If Rhea is running toward Sean and kicks the ball forward, Sean (who is standing still) sees the ball's speed equal to Rhea's running speed plus the kick speed relative to Rhea, so it is larger than the speed Rhea measures (which is just the kick speed relative to her).