How Does Lifting Objects Affect the Body's Center of Gravity?

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Homework Help Overview

The discussion revolves around how lifting objects of varying weights affects a person's body, particularly focusing on the concept of the body's center of gravity during such actions.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the shifting center of gravity when lifting objects, with some suggesting visual aids like stick figures to illustrate forces involved. Others express a need for more detailed explanations regarding the differences between lifting light and heavy objects.

Discussion Status

The conversation is ongoing, with participants seeking further clarification and assistance. Some have provided insights into the forces at play when lifting weights, while others continue to request additional help and examples.

Contextual Notes

There is a noted lack of equations or formal physics concepts in the initial posts, which may contribute to the participants' struggles with understanding the topic fully.

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Homework Statement


Discuss how a person's body is affected when lifting both light and heavy objects.


Homework Equations


No equations provided.


The Attempt at a Solution


The body's centre of gravity will be shifting at every moment. (I have a really poor grasp and understanding of physics concepts and this the only answer I can come up with. Please help me!)
 
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Try drawing a stick figure lifting things, and try to arrow the forces.
 
okay. How about something more graphic? The light and heavy part. For example, more on the centre of gravity part. Thanks for your help!
 
Help! Thanks to everyone who answered, but I still do not understand!
 
In order to actually lift a heavier weight, you'll need to provide a stronger force upon that object to counteract its own weight.

Thus, at the very least, if you move it with constant velocity, it will, by Newton's 3.law, affect your arm with a force equal to its own weight.

Thus, if you are not to fall through the ground, the ground must act upon you with a force equal to the sum of your own weight and the objects weight. That force is applied to your feet, presumably.
 
Wow, that's quite the type of answers I had been looking for. Thanks!
 
Hello thanks for the help I received since, but I really need more aid!
 
hello please help me with this qn! Thanks!
 
I'll toss in an experiment you can do at home. stand erect feet slightly apart, and lift one foot off the ground. assuming you have 2 legs, not too hard. Now with your right shoulder and arm pressed against a wall so that your hips, feet and shoulders are all perpendicular to the wall. Repeat above with left and right legs? What did you notice?
 

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