neglecting air resistance, after a rock thrown straight up reaches the top of its path and then falls a short distance, its acceleration is group of answer choices more than at the top of its path. the same as at the top of its path. less than at the top of its path.

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12-10-2022
Physics

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neglecting air resistance, after a rock thrown straight up reaches the top of its path and then falls a short distance, its acceleration is group of answer choices more than at the top of its path. the same as at the top of its path. less than at the top of its path.

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ayune ayune · Answer 1 · 2022-10-15T11:07:28-04:00

if a rock is thrown straight up and falls, then its acceleration is the same as at the top of its path and it is equal to g, the gravitational acceleration.

If an object is moving straight vertically, the acceleration is constant along its trajectory, either it moves upward or downward. It is the velocity that changes.

If the object is moving upward, the velocity decreases, until at the top position, the velocity is equal to zero. The acceleration is constant and it is equal to g, the gravitational acceleration.

v(t) = vo - gt

Where:

v(t) is the velocity at time t

vo is the initial velocity

If the object is moving downward, the velocity increases. Again, the acceleration is constant and it is equal to g, the gravitational acceleration.

v(t) = vo + gt

This situation is depicted on the attaches picture.

Hence, if a rock is thrown straight up and falls, then its acceleration is the same as at the top of its path and it is equal to g, the gravitational acceleration.

Learn more about acceleration here:

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