An object is attached to the lower end of a 100-coil spring that is hanging from the ceiling. The spring stretches by 0.210 m. The spring is then cut into two identical springs of 50 coils each. As the drawing shows, each spring is attached between the ceiling and the object. By how much does each spring stretch?
why don't they show the answers for these questions...
Don't over-complicate it!
If the 100 coil spring is capable of stretching 0.210 m, then a spring of half this length would be able to stretch 0.210/2 or 0.105 m.