Hooke’s Law 2

The diagrams show a steel spring and a graph of its length against the load applied to it.

                           
What is the extension of the spring when a load of \(20 \mathrm{~N}\) is applied to it?

A student adds weights to an elastic cord. He measures the length of the cord for each weight. He then plots a graph from the results, as shown.

                                                                                           
What has he plotted on the vertical axis?

The extension-load graph for a spring is shown. The unstretched length of the spring is\(17.0 \mathrm{~cm}\)

                                 
When an object is hung from the spring, the length of the spring is \(19.2 \mathrm{~cm}\).
What is the weight of the object?

Different loads are hung on a spring. The diagram shows the length of the spring with and without the loads attached.

                                                 
What is the extension of the spring when the load is \(400 \mathrm{~N} ?\)

A spring is stretched by hanging a piece of metal from it.

                       
Which name is given to the force that stretches the spring?

On Earth, a spring stretches by \(5.0 \mathrm{~cm}\) when a mass of \(3.0 \mathrm{~kg}\) is suspended from one end.
The gravitational field strength on the Moon is \(\frac{1}{6}\) of that on Earth.
Which mass, on the Moon, would stretch the spring by the same extension?

An experiment is carried out to determine the spring constant for a spring that obeys Hooke’s law.
A load is hung from the spring and the extension of the spring is measured.
Which calculation is used to calculate the spring constant?

A student measures the length of a spring. She then hangs different weights from the spring. She measures the length of the spring for each different weight.
The table shows her results.
\[
\begin{array}{|c|c|}
\hline \text { weight/N } & \text { length /mm } \\
\hline 0 & 520 \\
1.0 & 524 \\
2.0 & 528 \\
3.0 & 533 \\
4.0 & 537 \\
5.0 & 540 \\
\hline
\end{array}
\]
What is the extension of the spring when the weight hung from it is \(3.0 \mathrm{~N}\) ?

An experiment is carried out to measure the extension of a rubber band for different loads.
The results are shown below.
\[
\begin{array}{|l|r|r|r|r|}
\hline \text { load/N } & 0 & 1.0 & 2.0 & 3.0 \\
\hline \text { length/cm } & 15.2 & 16.2 & & 18.6 \\
\hline \text { extension/cm } & 0 & 1.0 & 2.1 & 3.4 \\
\hline
\end{array}
\]
Which figure is missing from the table?

A spring obeys Hooke’s law.
Which graph is obtained by plotting the extension of the spring against the load applied?