Thanks for the help rock but i figured it out just before i saw your post.
=extra force added to weight
therefore the total value showed on the scale is
W= 180N + 600N (the mass converted to weight)
Thanks again for the help
the question given is:
What would the reading on a bathroom scale be if a 60kg pupil was accelerated upwards at a rate of 3m.s-2
The Attempt at a Solution
F=420N which is...