Forces And Elasticity (GCSE Physics)

A block attached to a spring is stretched and the work done (area under force–extension) is 2.0 J. If the spring constant is 100 N/m, what was the extension x? (Use 1/2 k x^2 = 2.0)

If two springs in series are identical with constant k, the effective spring constant is:

The limit of proportionality on a force–extension graph is the point where:

Stress and strain are defined as stress = force/area and strain = extension/original length. What are their SI units?

Which sign is used in Hooke’s law F = -k x to indicate the spring force’s direction relative to displacement?

A spring obeying Hooke’s law when stretched means the extension of the spring is directly proportional to the applied force.

Two identical bungee cords each have spring constant 735 N/m and each is stretched by 8.0 m when a pod is released. The pod plus rider has mass 240 kg. Assuming no energy losses, what is the maximum rise (height gained) the pod achieves (in m)?

A material has Young’s modulus E defined as stress / strain. If a wire of original length 1.0 m extends by 1.0 mm under a given load, what is the strain?

A wire obeying Hooke’s law is used as a spring. If the extension doubles under a larger load, the elastic potential energy stored (1/2 k x^2) will:

A wire stretched from length L to L+?L has strain defined as:

Which expression gives the spring constant k for a spring stretched by a force F producing an extension x?