Home / CIE AS & A Level Physics : 6.2 Elastic and plastic behaviour – Exam style question – Paper 1

CIE AS & A Level Physics : 6.2 Elastic and plastic behaviour – Exam style question – Paper 1

Question

The graph shows how the length of a spring varies with the force applied to it.

The spring has unstretched length $L_{0}$. When a force F is applied, the spring has length L1.
What is the work done in stretching the spring to length $L_{1}$?

(A) $\frac{1}{2}FL_{1}$

(B) $\frac{1}{2}F$($L_{1}-L_{0}$)

(C) $FL_{1}$

(D) F$L_{1}-L_{0}$

Answer/Explanation

Ans: B

Question

A child holds a thin metal wire that is attached to a kite. The graph shows how the extension of the wire varies with its tension.

A gust of wind increases the tension from 100 N to 150N.
What is the change in the elastic potential energy of the wire caused by the gust of wind?
(A) 3.8mJ

(B) 19mJ

(C) 34mJ

(D) 38mJ

▶️Answer/Explanation

Ans: B

Question

A variable force is applied to ensure that a constant power is supplied to a train.
Which graph best shows the variation of the force F applied with the velocity v of the train?

▶️Answer/Explanation

Ans: A

Question

The force–extension graph for a spring is shown.

What represents the work done to extend the spring?
(A) the area under the graph
(B) the gradient of the graph
(C) the reciprocal of the gradient of the graph
(D) twice the area under the graph

▶️Answer/Explanation

Ans: B

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