Solving Projectile Paths & Moon Landings: Free Body Diagrams

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When an object is shot in a projectile path with the same initial and final height, the initial and final speeds are equal, but their velocities differ due to direction changes, and acceleration remains constant. For a rocket landing on the moon, the free body diagram indicates that the downward force exceeds the upward force, resulting in a net downward force. Consequently, this leads to downward acceleration, meaning the rocket's speed increases as it descends. The discussion emphasizes the relationship between forces, acceleration, and velocity during projectile motion and landing scenarios. Understanding these principles is crucial for solving problems related to projectile paths and rocket landings.
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Homework Statement



1. If an object is shot in a projectile path and its initial and final height is the same what is true.

2. If a rocket vertical is landing on the moon it shoots a bit of the rocket fuel while landing what is the correct Free body diagram.



The Attempt at a Solution


1.Well I know velocity initial and final cannot be the same because it has different directions.
So I would say initial and final speed are the same, and acceleration is constant right?


2. It would be a rocket with a greater downward force than upward force correct?
 
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narutodemonki said:
1.Well I know velocity initial and final cannot be the same because it has different directions.
So I would say initial and final speed are the same, and acceleration is constant right?
Right.
2. It would be a rocket with a greater downward force than upward force correct?
If the downward force is greater than the upward force, in what direction is the acceleration?
 
kuruman said:
Right.

If the downward force is greater than the upward force, in what direction is the acceleration?

net force would be down therefore acceleration would also be down so I guess that answer is correct
 
If the acceleration is down and the velocity is also down because the rocket is landing, does the speed increase or decrease?
 

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