Two objects must be in contact for them to exert a force on each other.

true
false

I would say true. exerting force is when something or someone is using their strength/motions against the other object. in order for that/them to use it on the other object/person they need to be touching.

example:

pushing a chair

divide the right side by the left side

0.024÷1.2=0.02 for example

which piece of furniture will have the most inertia and give the furniture movers the most difficulty in moving?  

answer

a 75kg dining table