Which arises first , strain or stress ?

A: Tap root system is that which arises from the radicle of seed. R: Adventitious roots can also arise from the radicle.

Stress & Strain

Statement-1: Elasticity restoring forces may be conservative. Statement-2: The value of strain for same stress are different while increasing the load and while decreasing the load.

Assertion Upto the elastic limit, strain prop stress. Reason Upto elastic limit, material returns to its original shape and size, when external force is removed.

On gradual loading , stress - strain relationship for a metal wire is as follows . Within proportionality limit , stress prop strain or, "Stress"/"strain" = a constant for the material of wire. If "Stress"/"Strain" is x in elastic region and y in the region of yield , then

On gradual loading , stress - strain relationship for a metal wire is as follows . Within proportionality limit , stress prop strain or, "Stress"/"strain" = a constant for the material of wire. Just on crossing the yield region, the material will have

According to Hooke's law of elasticity, if stress is increaed, the ratio of stress to strain

On gradual loading , stress - strain relationship for a metal wire is as follows . Within proportionality limit , stress prop strain or, "Stress"/"strain" = a constant for the material of wire. Two wires of same material have length and radius (L,r) and (2L , r/2) . The ratio of their young's modulii is

The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If Y_(A) and Y_(B) are the younng's moduli of the materials, then

The stress versus strain graphs for wires of two materials A and B are as shown in the figure. If Y_(A) and Y_(B) are the younng's moduli of the materials, then