An unstretched spring has a force constant of 1260N/m.
A) How large a force is required to stretch the spring by 1.6m from its unstretched length.
B) How much work is required to stretch the spring by 1.6m from its unstrected length.
C) How large a force is required to stretch the spring by 1.6m beyong the length reached in part A?
D) How much additional work is required to stretch the spring by 1.6m beyond the length reached in part A?