With the help of an experiment or an activity, show and verify the following: When two unequal forces act - Science - Force and Pressure

Question

With the help of an experiment or an activity, show and
verify the following:

When two unequal forces act on a body in opposite
direction, then the effective force
is equal in magnitude to "the difference of the
two forces" and acts in the greater force direction

{Please don't provide any web link or certified answer I
want only experts answer If possible, then experts please provide a
picture for the demonstration for a better understanding}
​

Decoder_2 · Accepted Answer

Dear student,
See the diagram below
We apply a force of 10N to a block in the right direction and 20N
towards left direction
Since these two forces are in opposite direction so they will
cancel each other

The net force on the block =10 N towards left

Hope it clears your doubt

Regards