With what force will a homogeneous copper cube, the length of which is a = 3.0 cm, stretch a rubber cord?

Initial data: a (length of the edge of a homogeneous copper cube) = 3 cm (0.03 m).

Reference values: g (acceleration due to gravity) ≈ 10 m / s2; ρm (copper density) = 8900 kg / m3.

The force with which a homogeneous copper cube can stretch a rubber cord is determined by the formula: F = m * g = ρm * V * g = ρm * a ^ 3 * g.

Calculation: F = 8900 * 0.03 ^ 3 * 10 = 2.4 N.

Answer: A uniform copper cube will stretch the rubber cord with a force of 2.4 N.