Practice Introduction (9.1) - ENERGY METHODS; Part I - Structural Engineering

Practise this section

8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
What does the first law of thermodynamics state?
Show hintHide hint
Think about energy conservation.
Question 2.
Define strain energy.
Show hintHide hint
Connect it with deformation processes.
3Question 3.
What is the essence of the first law of thermodynamics in structural analysis?
- Energy can be created.
- Energy is conserved.
- Energy cannot be destroyed.
Show hintHide hint
It deals with energy changes.
4Question 4.
Virtual work can be defined as what?
- True
- False
Show hintHide hint
Think about the definitions of virtual forces.
Question 5.
A structural beam supports a load of 10 kN. Calculate the strain energy stored in the beam if its length is 3 m, area is 40 cm², and E is 200 GPa.
Show hintHide hint
Use U = (P^2 L) / (2AE) directly in your calculations.
Question 6.
Explain how you would apply the Virtual Work method to assess bending in a simply supported beam with a central load.
Show hintHide hint
Ensure that you maintain equilibrium for both real and virtual loads.

4 more questions in this section. Enroll free to practise them all.