PHY question

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

Answer 1

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.