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persiflage
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I'm trying to understand the concept of work. I understand that no work can be done by a force if there is no displacement, but I have got confused about whether a force has to cause the displacement.
The site physicsclassroom.com says this:
But a mentor on this site says this:
This latter point seems reasonable to me since, if I raise a body with my hand then it is said that gravity has done negative work on that body; and gravity certainly hasn't caused the displacement.
Could anyone clarify please?
Thank you.
The site physicsclassroom.com says this:
But a mentor on this site says this:
This latter point seems reasonable to me since, if I raise a body with my hand then it is said that gravity has done negative work on that body; and gravity certainly hasn't caused the displacement.
Could anyone clarify please?
Thank you.