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The discussion revolves around calculating the acceleration of a space capsule launched from a cannon. The problem involves one-dimensional motion with constant acceleration, where the launch speed is given as 10.97 km/s and the cannon length is 220 meters. A kinematic equation is suggested to solve for acceleration, utilizing initial and final velocities along with distance. The conversation highlights the importance of identifying the correct kinematic equation to find the unknown acceleration. Ultimately, the participant resolves the issue by recognizing the necessary equation for the calculation.
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i have this problem i can't seem to get i think i am overthinking but just can't get it what is. this is a one dimensional motion with constant acceleration.what is the acceleration of a space capsule fired from a 220m long cannon with a launch speed of 10.97km/s
 
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where is the capsule fired from?
 
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Nevermind I've got it now. If you assume the launch speed it the velocity at the then off the barrel you need to use a kinematic equation. Can you think of which one you will need?
 
You know that the initial velocity, the final velocity and the distance that it went, there is an equation with those three variables and the acceleration. with that you have an equation with one unknown.
 
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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