Wood strips are generally more flexible than metal. This is due to the inherent properties of the materials. Wood, being a natural material, has a lower modulus of elasticity compared to metal. The modulus of elasticity is a measure of a material's stiffness or resistance to deformation under stress. For instance, the modulus of elasticity for wood is typically around 10 GPa, whereas for metals like steel, it can range from 200 GPa to 300 GPa. This significant difference in modulus of elasticity means that wood can bend and deform more easily under load, making it more flexible.

Data from the American Wood Council (AWC) supports this assertion. According to the AWC, wood has a tensile strength of approximately 4,000 to 5,000 psi, while steel has a tensile strength of around 60,000 psi. This indicates that wood can bend and deform more under tension before it breaks, contributing to its greater flexibility. Additionally, the coefficient of thermal expansion for wood is much higher than that for metal, meaning wood expands and contracts more with temperature changes, which can also contribute to its flexibility.

Metal, on the other hand, is known for its strength and rigidity. Its high modulus of elasticity and tensile strength make it less prone to bending and deformation. While metal can be made more flexible through processes like bending or forming, it generally requires more force to achieve the same degree of flexibility as wood.

In conclusion, wood strips are more flexible than metal due to their lower modulus of elasticity, tensile strength, and coefficient of thermal expansion. These inherent properties make wood a more versatile material for applications requiring flexibility and adaptability.