# Counterforce of a stretched gummi

According to Newton's 3rd law, $$F_{A\to B} = -F_{B\to A}$$, when you apply a force to an object, it applies the same force (against you?).

When I stretch a strap with my hands, which force exactly is it generating in return?

• Are you referring to the deformational behavior of elastomeric solids? – Chet Miller Nov 22 at 21:38