Forces, Density and Pressure - Deformation of solids

The change in size or shape of an object.

• Young's Modulus

• strain energy density

• variance

• deformation

The graph of stress against strain is always

• straight line

• parabola

• Straight line in elastic region

• parabola in elastic region

Young's modulus is property of

• solids

• solids and liquids

• solids or liquids

• gases

This refers to the ratio of tensile stress to tensile strain.

• Bulk Modulus of elasticity

• Shear Modulus of Rigidity

• Young's Modulus of elasticity

How much force is required to shear off a metal sheet whose thickness is 2mm and width of 40cm? The shear stress is 5 x 10⁷ N/m².

• 400 kN

• 40 kN

• 4 kN

A nylon string, has a diameter of 2mm, is pulled by a force of 100N. Determine the stress.

• 315 MPa

• 31.5 MPa

• 3.15 MPa

A 1-m long cord is pulled by a force causing its length to change by 2mm. Determine the strain.

• 0.2

• 0.02

• 0.002

Which of the following does NOT determine Young modulus?

• Force

• Area

• Shear strain

• Volume

What is the equation to calculate Young's Modulus?

• Young Modulus = E = ^Stress/_Strain

• Young's Modulus = E = mc²

• Youngs modulus = E =^Strain/_Stress

• Young's Modulus = E = ¹/₂Fx

Definition of Plastic Deformation?

• Being completely solid and not bending

• 'Stretching' and returning to the original shape

• 'Stretching' and not returning to the original shape

• Falling to the floor due to lack of structure.