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1 vote

Why do objects with greater length feel heavier - and how to calculate perceived weight?

I expect a long hose is harder to drag because most of the length is pressing on the concrete. There is a lot of friction. You could pick up a shorter object, eliminating the friction. @Paulina mostly ...
mmesser314's user avatar
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1 vote

Why do objects with greater length feel heavier - and how to calculate perceived weight?

There is indeed an accurate way to calculate the amount of what you call "effort". In physics, this concept is known as work $W$, and is the energy transferred to an object by letting a ...
paulina's user avatar
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1 vote

Is the work I do on the object always equal in magnitude but opposite in sign to the work the object does on me?

Does Newton's third law also hold in the work-energy theorem? In other words, are the 'work I do on the object' and the 'work the object does on me' equal in magnitude but opposite in sign? Sometimes ...
Ján Lalinský's user avatar

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