where are you ?
in normal circumstances the normal force acting an object and the force of static friction do no work on the object . however, the reason that the work is zero is different for the the two cases . Explain why each dose zero work
becuse there is no displacment
For normal force, there is no displacement.
For the static friction, there is no force until an external force is applied on the object.
Sorry, your post didn't show up in the 'New Posts' list. It's only now that I check this area that I notice there have been many threads I missed.