Elasticity and Hooke's law

Question 1 of 10

A wire of cross-sectional area 2 × 10⁻⁶ m² carries a load of 200 N. Find the stress.

Question 2 of 10

A steel wire is stiffer than a copper wire of the same dimensions.

Question 3 of 10

A spring of constant 20 N/m carries a load of 4 N. Its extension is ___ m.

Question 4 of 10

Explain the terms elastic, plastic, ductile and brittle, giving an example of a material for each.

Question 5 of 10

The energy stored in a stretched spring is

Question 6 of 10

Describe an experiment to verify Hooke's law for a spiral spring. Sketch the expected graph and explain how the spring constant is obtained.

Question 7 of 10

Rubber obeys Hooke's law perfectly.

Question 8 of 10

Find the energy stored in a spring of constant 50 N/m stretched by 0.05 m.

Question 9 of 10

A spring of constant 50 N/m carries a load of 4 N. Its extension is ___ m.

Question 10 of 10

Plastic deformation is reversible.