where does energy go if work is done by a non-conservative force ?

The energy changes

Explanation:

When an non-conservative force (for example friction, air resistance, applied force) does work on an object, the total mechanical energy (Ek+Ep) of that object changes. If positive work is done, then the object will gain energy. If negative work is done, then the object will lose energy.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000