Calc Projectile motion horizontal velocity

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The discussion focuses on calculating various parameters of projectile motion for an object with a mass of 7.3g projected over a distance of 24.5m. The equation used, V=d/t, was incorrectly applied, leading to confusion about the relevance of mass in the calculations. It is clarified that mass is not necessary for determining horizontal velocity when ignoring drag. The main takeaway is that time is the critical factor in the equation, not mass. Understanding the correct application of the formula is essential for solving projectile motion problems accurately.
H3lpPlz
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Homework Statement


Calculate any or all of the following: horizontal velocity, initial vertical speed, angular launch speed, launch angle, and maximum height all for an object with a mass of 7.3g that is projected 24.5m.


Homework Equations





The Attempt at a Solution


V=d/t V=24.5/7.3 V=15.031
 
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H3lpPlz said:

Homework Statement


Calculate any or all of the following: horizontal velocity, initial vertical speed, angular launch speed, launch angle, and maximum height all for an object with a mass of 7.3g that is projected 24.5m.


Homework Equations





The Attempt at a Solution


V=d/t V=24.5/7.3 V=15.031
Your solution is incorrect. What do the symbols in the equation v=d/t represent?
 
Pardon me if I am wrong but knowing mass in this case is useless or is it time?
 
michalll said:
Pardon me if I am wrong but knowing mass in this case is useless or is it time?
If we are ignoring drag (which I am assuming that we are), then you are indeed correct. The mass of the object is superfluous in this case.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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