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bananan
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A rock is thrown vertically upwards with a speed 'v' from the edge of a cliff. At the same moment, a second rock is thrown vertically downwards with the same initial speed 'v'. Which of the following statements regarding the motion of the rocks is true (ignore air resistance.)?
a. The rock which was thrown upwards reaches the bottom of the cliff with a higher velocity.
b. The rock which was thrown downwards reaches the bottom of the cliff with a higher velocity.
*c. Both rocks reach the bottom of the cliff with the same velocity at the same time.
d. Both rocks reach the bottom of the cliff with the same velocity but at different times.
The answer to this question is (C). Can someone please clearly explain to me WHY this is the case? How does the conservation of mechanical energy factor into the answer?
a. The rock which was thrown upwards reaches the bottom of the cliff with a higher velocity.
b. The rock which was thrown downwards reaches the bottom of the cliff with a higher velocity.
*c. Both rocks reach the bottom of the cliff with the same velocity at the same time.
d. Both rocks reach the bottom of the cliff with the same velocity but at different times.
The answer to this question is (C). Can someone please clearly explain to me WHY this is the case? How does the conservation of mechanical energy factor into the answer?