- #1
Vicol
- 14
- 0
Hello everyone :)
Could someone explain me how is it possible that we "lose energy" when we hold something in our hands though there is no shift/displacement? We feel it physically - tiredness.
I can generalize this question - to keep something at certain height we have to use force. But work is scalar product of force and shift, so in this case it seems to be zero. Do we need energy to "generate" force which keeps something in fixed possition?
Could someone explain me how is it possible that we "lose energy" when we hold something in our hands though there is no shift/displacement? We feel it physically - tiredness.
I can generalize this question - to keep something at certain height we have to use force. But work is scalar product of force and shift, so in this case it seems to be zero. Do we need energy to "generate" force which keeps something in fixed possition?