# When is Euler's formula applicable?

**Q. Euler's formula is applicable only _________**

1. for short columns

2. for long columns

3. if slenderness ratio is greater than √(π^{2} E / σ_{c})

4. if crushing stress < buckling stress

5. if crushing stress ≥ buckling stress*- Published on 21 Sep 15***a.** 1, 2 and 3

**b.** 2, 3 and 5

**c.** 3 and 4

**d.** all of the above

**ANSWER: 2, 3 and 5**