Physics, asked by amAn7867, 1 year ago

Is work done if there is distance but no displacement?

Answers

Answered by Anonymous
5
Hello mate here is your answer»»»
Note that because there is no displacement, the value of the applied forces are equal. In conclusion, no work is done. We can calculate thework done by each force, but usually that is only used for proof that no workis done. Since the object did not move,no work was done.
Hope this will help you«««....

amAn7867: it's from circular motion. In complete revolution is work done?
thebadboy: In a complete revolution the displacement is zero, so work done is also zero.
Answered by thebadboy
1
To simply state an answer to each question:

No displacement = no work done

the definition of work is when a force acts on an object to displace it

Yes, you can calculate the work done by each force. You can calculate the applied force pushing the mass one way, and the applied force pushing the mass the other way. Note that because there is no displacement, the value of the applied forces are equal.

Ex. 1N pushing right, -1N pushing left - this is a negative value because it is pushing in the opposite direction

Each force applies work to the mass. 1N X 1m = 1J and -1N X 1m = 1J

Because that each force does "work" on the box in the case that the other force is absent

We say there is no work done/there is no displacement because the work done by each force cancels out: W total = 1J + (-1J) = 0J

In conclusion, no work is done. We can calculate the work done by each force, but usually that is only used for proof that no work is done. Since the object did not move, no work was done.


thebadboy: please, Mark as brainliest if helpful..
amAn7867: sure but.. . In circular motion, one revolution is equal to its circumference but it arrives at original position after one revolution so no displacement, then is work done?
thebadboy: can't u understand
thebadboy: if there is no displacement then there is no work done.
amAn7867: hmm kk
amAn7867: A sphere of mass m is tied to one end of a string of length l and rotated through the other end along a horizontal circular path with speed v. the work done in full horizontal circle is?
thebadboy: The centripetal force, being directed towards the centre is always perpendicular to the direction of displacement which is the direction of the velocity. Thus the dot product F.S=0, i.e. work done is zero.
amAn7867: okz
thebadboy: mark my answer as brainliest
amAn7867: yes
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