A student investigates the stretching of a spring using a vertical metre rule, a clamp stand, and various weights. The initial unstretched length of the spring is $l_0$ . Under different loads $L$ , the student records the total length $l\,$ of the coiled part of the spring.

The results obtained are shown in the table below:

\begin{array}{|c|c|c|c|c|c|c|} \hline L \text{ / N} & 0.0 & 1.0 & 2.0 & 3.0 & 4.0 & 5.0 \\ \hline l \text{ / mm} & 25 & 45 & 65 & 85 & 105 & 125 \\ \hline \end{array}

Describe one precaution that the student should take to obtain reliable and accurate readings of the spring length.

State whether the results support the suggestion that the total length $l\,$ of the spring is directly proportional to the load $L$ . Justify your answer.

Calculate the load $L\,$ that would stretch the spring to a total length equal to twice the initial unstretched length $l_0$ . Show your working.

The results obtained are shown in the table below:

\begin{array}{|c|c|c|c|c|c|c|} \hline L \text{ / N} & 0.0 & 1.0 & 2.0 & 3.0 & 4.0 & 5.0 \\ \hline l \text{ / mm} & 25 & 45 & 65 & 85 & 105 & 125 \\ \hline \end{array}

Describe one precaution that the student should take to obtain reliable and accurate readings of the spring length.

State whether the results support the suggestion that the total length $l\,$ of the spring is directly proportional to the load $L$ . Justify your answer.

Calculate the load $L\,$ that would stretch the spring to a total length equal to twice the initial unstretched length $l_0$ . Show your working.

1.5.1a Forces, resultant force and motion

Question 1

Markscheme

1.5.1a Forces, resultant force and motion

Question 1

Markscheme

1.5.1a Forces, resultant force and motion

Question 1

1.5.1a Forces, resultant force and motion Questions

1.5.1a Forces, resultant force and motion

Question 1

1.5.1a Forces, resultant force and motion Questions