Physics Practice Test – Elasticity (Questions with Answers and Explanations)

Hello and Welcome to Physics Practice Test - Elasticity

1. You are to attempt 5 random objectives questions ONLY.
2. Supply Your Full Name and Location in the text box below and begin immediately.
3. You can attempt as many times as possible
1.

A string of length 4 m is extended by 0.02 m when a load of 0.4 kg is suspended at its end. What will be the length of the string when the applied force is 15 N? [g = 10 ms-2] (JAMB 2007)

A. 5.05 m   B. 6.08 m   C. 4.05 m   D. 4.08 m

2.

A spring of force constant 500 Nm-1 is compressed such its length shortens by 5 cm, the energy stored in the spring is ________ (JAMB 2008)

A. 0.625 J   B. 6.250 J   C. 62.500 J    D. 625.000 J

3.

An elastic material has length of 36 cm when a load of 40 N is hung on it and a length of 45 cm when a load of 60N is hung on it. The original length of the string is ______ (JAMB 2005)

A. 20 cm   B. 18 cm   C. 15 cm    D. 12 cm

4.

The diagram below shows the force extension curve of a piece of wire. The energy stored when the wire is stretched from E to F is _______ (JAMB 2002)

A. 7.5 x 10-3 J   B. 2.5 x 10-3 J   C. 1.5 x 10-2 J   D. 7.5 x 10-1 J

5.

If a load of 1 kg stretches a cord by 1.2 cm, what is the force constant of the cord? [g = 10ms-2] (JAMB 2012)

A. 866 Nm-1   B. 833 Nm-1   C. 769 Nm-1   D. 667 Nm-1

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