Apple’s launch of the iPhone 15 Pro Series brought forth an intriguing change – the incorporation of a titanium frame. Surprisingly, this alteration results in the iPhone 15 Pro weighing approximately 9 percent less than its predecessor, the iPhone 14 Pro Series. While the numeric difference might appear slight, the tactile sensation of holding the device tells a different story, one influenced by the principles of inertia.
The iPhone 15 Pro now boasts a weight of just 187 grams, notably lighter than the iPhone 14 Pro’s 206 grams. Similarly, the iPhone 15 Pro Max registers at 221 grams, in contrast to the iPhone 14 Pro Max’s 240 grams. In raw grams, the reduction in weight for the iPhone 15 Pro Series seems minimal, making it easy to underestimate.
However, the secret behind this apparent reduction in weight lies in Apple’s choice of frame material, specifically the use of a titanium alloy. This choice has reimagined the distribution of weight, centralizing it and, in turn, reducing the moment of inertia. What does this mean for users? A smartphone that feels lighter in the hand than its physical weight would suggest.
To delve into the physics at play, it’s important to understand the concept of the moment of inertia. In essence, the moment of inertia increases as mass moves farther away from an object’s axis of rotation. Based on an analysis of the iPhone 15 Pro Series dimensions, it’s estimated that Apple’s latest creation exhibits a moment of inertia reduced by approximately 14-15%.
The decision to adopt titanium as a frame material underscores Apple’s dedication to enhancing the user experience. Especially for individuals with smaller hands, where device weight can become a significant factor, this change is poised to make a noticeable difference.
