Physics (AS & A Level) · May / June 2016 · Paper 13 · Question 2

The stress σ needed to fracture a particular solid is given by the equation σ = k√(γE/d) where E is the Young modulus, d is the distance between planes of atoms, and k is a constant with no units. What are the SI base units of γ?

1. Akg m s⁻²
2. Bkg s⁻²
3. Ckg m s⁻¹
4. Dkg s⁻¹

As printed in the paper