Maximizing Speed: Understanding the Pendulum Motion

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The discussion focuses on the dynamics of pendulum motion, specifically the speed of the pendulum bob at its highest point. It clarifies that the maximum speed of the pendulum occurs at the lowest point of its swing, not at the top. The top point is where the pendulum momentarily stops before reversing direction, resulting in zero speed at that instant. Participants suggest conducting a simple experiment with a pendulum or swing to observe these principles firsthand. Understanding these concepts is essential for grasping basic physics related to motion and energy.
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The top point reached, is the max. speed obtained. Am i wrong? I am new into physics.
 

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What happens to the pendulum bob when it reaches the top point? What must its speed be at that point?
 
"The top point reached, is the max. speed obtained. Am i wrong? I am new into physics."

Do an experiment: build a simple pendulum and see what happens at the top.
 
A similar set up that might help you is to consider yourself swinging on a swing. When are you moving fastest?
 
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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