? asked in 科學及數學其他 - 科學 · 1 decade ago

PHY question

"The direction of acceleration changes when an object suddenly reverses its direction of motion" 我想問呢句野正唔正確?同埋點解.....用中文答....3q

1 Answer

  • 天同
    Lv 7
    1 decade ago
    Favorite Answer

    Definitely NOT correct.

    Acceleration brings a change of velocity. "Reverse in direction of motion" only indicates a change in velocity direction, it doesn't imply that the acceleration also changes its direction.

    Just think of an example of a ball thrown vertically upward. When the ball reaches the highest point and returns, the acceleration (the acceleration due to gravity) direction, which always pointing downward, doesn't change at all.

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