Question

If a ball is being lifted at a constant speed, does this mean that acceleration is 0 and therefore F=ma=0 and therefore no work is done on the ball?

Answer 1

It does mean that no net work is done on the ball. There might have been work applied by the lifting force to overcome both gravity and friction. If all of that work was used overcoming friction and gravity, there would be no speed change.

Answer 2

Thanks!