Loading a Spring (optional)
A 1 kg weight is attached to an initially unstretched spring
(spring constant k = 100 N/m) and then lowered gently
until the spring holds it up without moving.
(a)
FBD: How far does the spring stretch?
(b)
Energy Conservation: How much potential energy
is now stored in the spring? Compare this with the change in
gravitational potential energy of the mass. Comment.
Edition) problems
17, 61, 63, 86 and 94