Quiz – 1

Strain is the ratio of change in dimension to original dimension. So it is dimensionless.

The tensile stress is the ratio of change in length to the original length. It is the stress induced in a body, when subjected to two equal and opposite pulls. The ratio of increase in length to the original length is the tensile strain.

Strain = dL/L = 0.3/250 = 0.0012.

dL = strain x L = 0.005 x 100 = 0.5mm.

Force = mass x acceleration = kg x m/s² = N.

Milestone means achievement . it is not and unit of distance.

The ductile material can be drawn into wires because it can resist large deformation.Malleability is the property by which it can be made into thin sheets.

Beam is said to be uniform strength if at every section along its longitudinal axis, the bending stress is same.

When there is an eccentric load it means that the load is at some distance from the axis. This causes compression in one side and tension on the other. This causes bending stress.

When a beam is in bending the layer in the direction of bending will be In compression and the other will be in tension. One side of the neutral axis will be shortened and the other will be elongated.