Can two people be equally strong even if one is physically smaller than the other?

Yes, two people can be equally strong even if one is physically smaller than the other. Strength is not solely determined by size but also by factors such as muscle density, muscle fiber composition, and training. 

Smaller individuals can possess a high strength-to-weight ratio, which means they can exert significant force relative to their body size. This is often seen in weightlifting and combat sports, where technique, leverage, and training are crucial. For instance, athletes who focus on strength training can develop significant muscle power and efficiency, allowing them to achieve impressive strength levels despite having a smaller physique.

Moreover, strength can be influenced by genetics, training methods, and overall fitness. Thus, it is possible for a smaller person to match or even exceed the strength of a larger person in specific contexts or measurements of strength.