Is Net External Work Only the Work Done by the Hand in a Spring System?

[kykk]

Quick question about net external work

Got a block (A) attach to Spring which attach to a Wall
Hand pushes A toward the wall which compress the Spring

So hand is doing positive work on A, W = F*D, work is whatever force by hand times distance..
But work done ON the spring BY the wall is zero right? wall didn't move, spring didn't move?

if zero for the wall, then the net external work on the system (block A + Spring) is just the work done by hand, the same W = F*D ?

 

[NascentOxygen]

Hi kykk.

But work done ON the spring BY the wall is zero right? wall didn't move, spring didn't move?

That sounds right.

if zero for the wall, then the net external work on the system (block A + Spring) is just the work done by hand, the same W = F*D ?

Yes. If the wall hadn't pushed back, the hand would have had nothing to push against and could not have done any work here.