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標題: [Phy] Force and Motion 一問 [打印本頁]

作者: dsefighter2020    時間: 2018-8-3 02:22 PM     標題: Force and Motion 一問

Why a body may be at rest but undergoes acceleration? Is it because it is changing the direction of motion, and it's momentarily at rest?

作者: kiwakwok    時間: 2018-8-4 05:40 AM

Think about throwing a ball vertically upward. What happens when the ball is at its highest position?

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