78) When is work said to be done?

Answer is:

When a force acts on a body and the body undergoes a displacement.

Answer is:

Answer is:

Answer is:

Explanation:

The point where the bending moment changes sign is known as point of contraflexure. Point of contraflexure generally occurs in overhanging beams.

Within elastic limits, strain produced is inversely proportional to the stress producing it.

Withing two end of the beam, strain produced is proportional to the stress producing it.

Within elastic limits, strain produced is proportional to th e stress producing it.

Strain produced is proportional to the volu me of the object producing it.

Answer is: