The force due to a elastic string is the modulus of elasticity times the amount of stretch: (24)(1.5- 1.25= (24)(.25)= 6N. (Did you copy this correctly? The "modulus of elasticity" is not a force and cannot have units of "N". It should be "Newtons per meter" or "N/m".)
What is "mew"? F=ma. "At the point of slipping", the total force is 0 so the friction force is, in magnitude, the same as the elastic force.part bi i think maybe i use the same equation but instead of (9.8) i put 'a' then solve for a?
part bii i think that the point of slipping f = mew*r ??