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

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)

Given that Young's modulus for aluminium is 7.0 x 10¹⁰ Nm^-2 and density is 2.7 x 10³ kgm^-3, find the speed of the sound produced if a solid bar is struck at one end with a hammer. (JAMB 2003)

A copper wire was subjected to a tensile stress of 7.7 x 10⁷ Nm^-2. Calculate the tensile strain of the wire [Young Modulus = 1.1 x 10¹¹ Nm^-2] (JAMB 2011)

A string of length 5 m is extended by 0.04 m when a load of 0.8 kg is suspended at the end. How far will it extend if a force of 16 N is applied? [g = 10 ms^-2] (JAMB 2017)

A catapult used to hold a stone of mass 500 g is extended by 20 cm with an applied force F. If the stone leaves with a velocity of 40 ms^-1, the value of F is ______ (JAMB 2000)