A cube has side length 5 cm and modulus of rigidity 105 N/m2. The displacement produced by a force of 10 N in the upper face of cube is ______ mm. [2026]
(2)
η=F/Aϕ=FhAx
x=FhAη=10×5×10-225×10-4×105=1500 m
∴ x=2 mm