Why does the direction of gravitational acceleration stay the same?

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The discussion clarifies the distinction between speed and velocity, emphasizing that while speed remains constant, velocity can change direction. Gravitational acceleration consistently points downward, regardless of an object's motion. This directionality is a fundamental aspect of gravitational force in a given inertial reference frame. The participants conclude that the Earth's position does not affect the direction of gravitational acceleration. Ultimately, gravitational acceleration remains constant and directed downward, irrespective of the object's velocity.
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Homework Statement



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The Attempt at a Solution


Since at N the gravity is now heading down towards the person in a positive direction it's acceleration is G, where as velocity goes up then comes down towards the person so it's velocity is now negative, thus -V, but the correct answer is A?? Why do both components stay the same?
 
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Hint: Is speed the same thing as velocity?
 
gneill said:
Hint: Is speed the same thing as velocity?

Yep, you're right, I confused speed and velocity. So now I understand why speed V is the same.

But for gravity, why has that not changed?
 
ravsterphysics said:
Yep, you're right, I confused speed and velocity. So now I understand why speed V is the same.

But for gravity, why has that not changed?
The Earth didn't move? :smile:

The direction of the gravitational acceleration vector in the chosen inertial reference frame is independent of the motion of the projectile. Down is still down.
 
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