Which of the following is correct?
1
The maximum amount of energy which can be stored in a body up to elastic limit is known as proof resilience.
2
The amount of energy a material can absorb before actual fracture takes place is called creep.
3
The capacity of material to absorb energy within the elastic limit is known as toughness.
4
The slow and progressive deformation of a material with time at constant stress is called fatigue.