If the elastic potential energy density store in a material is  due to the application of longitudinal stress of  

then, the strain developed in it would be

This question was previously asked in
Airforce Group X MBT 12-Jul-2021 Shift 3
View all Airforce Group X Papers >
  1. None

Answer (Detailed Solution Below)

Option 1 :
Free
General Knowledge for All Defence Exams (शूरवीर): Special Live Test
20 Qs. 20 Marks 16 Mins

Detailed Solution

Download Solution PDF

Correct option-1

Concept:

  • Elastic potential energy is the energy stored as a result of applying a force to deform an elastic object. 
  • The energy is stored until the force is removed and the object regains its original shape, doing work in the process.
  • This deformation could involve compressing, stretching, or twisting the object.
  • Many objects are specifically designed  to store elastic potential energy inside them,


For example:

The coil spring of a wind-up clock
An archer's stretched bow
A stretched slingshot ready to fire.

Calculation:

Given:-

Elastic potential energy density store , stress = 1011 N/m2

since the elastic potential energy density (U) is given by:-

⇒ 

⇒ 

therefore, the required strain = 

Hence, the Correct option- 1

Latest Airforce Group X Updates

Last updated on Jul 11, 2025

->Indian Airforce Agniveer (02/2026) Online Form Link has been activated at the official portal. Interested candidates can apply between 11th July to 31st July 2025.

->The Examination will be held 25th September 2025 onwards.

-> Earlier, Indian Airforce Agniveer Group X 2025 Last date had been extended.

-> Candidates applied online from 7th to 2nd February 2025.

-> The online examination was conducted from 22nd March 2025 onwards.

-> The selection of the candidates will depend on three stages which are Phase 1 (Online Written Test), Phase 2 ( DV, Physical Fitness Test, Adaptability Test), and Phase 3 (Medical Examination).

-> The candidates who will qualify all the stages of selection process will be selected for the Air Force Group X posts & will receive a salary ranging of Rs. 30,000.

-> This is one of the most sought jobs. Candidates can also check the Airforce Group X Eligibility here.

More Mechanical Properties of Solids Questions

Hot Links: teen patti party teen patti 51 bonus teen patti master real cash teen patti cash