2
QuizMultiple Choice

Speed and Velocity — Quiz

Question 2 • Physics

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?

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

Explanation

Sean is standing still, so his frame of reference measures the ball’s speed relative to the ground. Rhea is moving toward Sean in the ball’s direction, so the ball’s speed relative to Rhea is reduced by her running speed. Therefore, the ball’s speed from Sean’s frame is greater than its speed from Rhea’s frame.

AI-written and checked against the verified answer.

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