U4.1 – Hooke’s Law

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Hooke's Law

1 / 12

A spring extends by 12 cm when a mass of 87 g is attached to it. Calculate the spring constant. g = 9.81 ms-2

2 / 12

If the deformation of the material is plastic, the material __________.

3 / 12

Under a 4 N force, two identical springs, in parallel, stretch 130 mm. Calculate the spring constant for one of the springs.

4 / 12

Estimate k from the graph shown above.

5 / 12

A meteor traveling through space has a k = 4.2x106 Nm-1 and a force of 5x108 N. Calculate the extension of the meteor.

6 / 12

Two nichrome wires, A and B, have a load of 30 N placed on them each. The original lengths of the wires are 3 m and 2 m. Each wire shows the same extension. Find the ratio of Ak to Bk.

7 / 12

At which point on the graph shown above is the elastic limit?

8 / 12

What is another term for tensile deformation?

9 / 12

This graph shows the extension of 4 different springs, which spring is the stiffest?

10 / 12

What is the relationship between the force applied, F, and the extension, x of a material that obeys Hooke's Law?

11 / 12

Two springs attached in series extend by 5 cm when a load of F is applied to them. They have different constants of 76 Nm-1 and 31 Nm-1 respectively. Calculate the value of F.

12 / 12

When plotting a force extension graph for the loading and unloading of a material, when would the unloading line not pass through the origin?

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