An engineering student found that the Youngs modulus of an alloy was 2.8 x 10^11 Pa. The 1.5m wire of the allow increased in length by 0.24% during an experiment. Calculate the stress on the wire.

The Youngs modulus of a material is = Stress / Strain. Therefore, the stress of an object is the strain multiplied by the Youngs modulus. We know that strain is the change in length (or extension) divided by the original length.  Which in this case, is  (1.5 * 1.0024 )m  /  1.5m - notice the units cancel. Multiplying this by 2.8x 10^11Pa (YM) will give us a stress of 6.7 x 10^8 Pa. Notes: 0.0024 is 0.24% written as a decimal, so an increase in 0.24% is 1.0024 multiplied by the original length.

DT
Answered by David T. Physics tutor

3548 Views

See similar Physics A Level tutors

Related Physics A Level answers

All answers ▸

Complete the following nuclear equation p+ -----> n + ... + ...


Electrons moving in a beam have the same de Broglie wavelength as protons moving in a separate beam. The proton beam moves at a speed of 3.1 x 10^4 m/s. What is the speed of the electrons?


If a star with a radius of 600000km has a surface temperature of 6000K, calculate its luminosity


In a circuit with a thermistor and bulb, what happens to the brightness of the bulb as the temperature increases?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning