Question #e135f

1 Answer
Aug 2, 2016

You have to apply a free body diagram to the object being acted upon.

Explanation:

Since you have 2 forces of #100 N# each opposing a frictional force of #80 N#, the net F is as follows

#sum# #F# = #100 N + 100 N - 80 N#
#sum# #F# = #200 N - 80 N#
#sum# #F#= #120 N#