Question on: JAMB Physics - 2024

Young's modulus (E) is defined as the ratio of tensile stress to tensile strain.

1. Tensile stress is force per unit area, which has dimensions of Force/Area.
    - Force has dimensions of MLT⁻².
    - Area has dimensions of L².
    - Therefore, tensile stress has dimensions of ML⁻¹T⁻².

2. Tensile strain is a dimensionless quantity (change in length/original length).

3. Since Young's modulus is stress/strain, and strain is dimensionless, the dimensions of Young's modulus are the same as the dimensions of stress. Thus, Young's Modulus (E) has the dimensions of ML⁻¹T⁻².