NCUK Young's Modulus

Young's modulus is defined by;

• Tensile strain/Tesnsile stress

• Tensile stress x Tensile strain

• Tensile stress / Tensile strain

• Length / area

The limit beyond which the material does not behave elastically is known as;

• Proportional limit

• Elastic limit

• Yield Point

• Plastic limit

A wire is stretched 3 mm by a force of 150 N. Assuming the elastic limit is not exceeded, the force that will stretch the wire 5 mm is:

• 150 N

• 90 N

• 450 N

• 250 N

A spring has a spring constant of 450 N/m. How far is the spring compressed if 150 N of force are used?

• 2.2 m

• 0.3 m

• 5.0 m

• 3m

What force should be applied to compress a spring by 0.5m if its spring constant is k = 1500 N/m?

• 1880 N

• 750 N

• 1500 N

• 3000 N

Which of the following is a true statement regarding springs?

• The higher the value of the spring constant, the stiffer the spring.

• In Hooke's law, the force exerted by the spring acts in the same direction as displacement.

• Springs are designed to provide unpredictable variations in force.

• The force exerted by a spring has a quadratic relationship with the displacement form equilibrium.

A force of F=500 N is applied to extend a spring. What is the displacement x of the spring if its spring constant is k= 500 N/m?

• 0.1 m

• 1000 m

• 1 m

• 100m

0.2mm² is equivalent to

• 2x10^-7m²

• 2x10^-4m²

• 200x10³m²

• 200m²

A 2m wire extends by 4mm what is the strain?

• 0.5

• 2x10^-3

• 2x10^-6

• 0.005