U4.3 – Young’s Modulus

2

Young's Modulus

1 / 10

A material has a stress of 6x108 Nm-2 and is placed under a 5% strain. Calculate the value for the materials Young's modulus.

2 / 10

What is Young's modulus a measure of?

3 / 10

What is the units for Young's modulus in terms of SI units?

4 / 10

The graph above shows a wire being extended by adding masses. Estimate from the graph the Young's modulus.

5 / 10

When investigating Young's modulus, why should you use a long wire?

6 / 10

The Young's Modulus for a single walled carbon fibre nanotubes of diameter 4 nm is 1000 GPa. If it is placed under 75% strain, what force is required to break it?

7 / 10

Stress and strain are used to calculate the Young's modulus of a material up to its _____________.

8 / 10

A unknown material under load 75 N incurs an extension of 2.1 mm. The original length of the material was 1.75 m and it has a diameter of 0.45 mm. Which material is it most likely to be?

9 / 10

A copper wire of diameter 0.6 mm, X, is joined in series to the end of another copper wire of diameter 0.125 mm, Y. Both wires are 80 cm in length when no load is applied. A 15 N load is hung on the end of the wires as shown in the diagram below. If the Young's Modulus of copper is 128 GPa, calculate the extension for each wire.

10 / 10

Two wires, Q and W, are connected in series and a force, F is applied. Q and W have the same length, l the same diameter, d but are made from different materials. Therefore, the Young's Modulus of Q, E, is twice the value of W. Which expression is correct for the total extension in the system?

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