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iPhone 15 Pro Likely Feels Even Lighter Than It Really Is Due to Inertia Change

I'm surprised Apple has an implemented some type of inertia charging because of all the jostling we do with our iPhone and watches. :rolleyes:
 
  • Wow
Reactions: raybo
A 9% decrease in weight is something, but I venture to guess that unless Apple specifically mentioned it in the keynote nobody would be fawning over it now.

It just goes to show how little it takes for Apple's faithful to sing praises.
 
I am so looking forward for lighter weight on Pro Max as its weight is always pulling my short down every time ☺️ I put it in my short pocket and making me always having to readjust it every time.
 
MacRumors said:


The iPhone 15 Pro likely feels considerably lighter than the iPhone 14 Pro, not just due to the switch from stainless steel to titanium, but also a change to the device's moment of inertia, according to calculations by Dr. Drang's LeanCrew blog.

iPhone-15-Pro-Internal-Chassis.jpg

The iPhone 15 Pro weighs 187g, a 9% reduction of the iPhone 14 Pro's 206g weight. During its announcement, Apple highlighted that the new lightweight feel is facilitated by switching from a stainless steel frame to titanium. Those who have already spent some time with the iPhone 15 Pro, including MacRumors' Dan Barbera, have noted just how much lighter the device feels in the hand. Yet new analysis suggests that the iPhone 15 Pro likely feels even lighter than its actual weight reduction due to a change of its moment of inertia.

The moment of inertia, a fundamental concept in physics, measures an object's resistance to rotational motion. Its value is determined by both the amount of mass an object has and how that mass is distributed. Crucially, the further away mass is positioned from an object's axis of rotation, the greater the moment of inertia. Thus, for commonly handled objects like smartphones, this resistance to rotation plays a significant role in how weighty or light they feel during daily use.

Apple's shift from stainless steel to titanium for the iPhone 15 Pro's outer band is pivotal in this change since a substantial portion of the phone's weight reduction is localized at its outer edges. Dr. Drang's analysis suggests that by minimizing mass predominantly at the perimeter, Apple achieved a reduction in the phone's moment of inertia that is more significant than would be expected from the sheer weight decrease alone.



Based on an analysis of the new phones' dimensions and assuming the mass reduction is mostly around the phone's perimeter, the moment of inertia for the iPhone 15 Pro is estimated to be reduced by 14–15%. Overall this means that the iPhone 15 Pro doesn't just weigh less; its design ensures that its mass is distributed in a manner that makes it resist rotational motion less strongly. This results in a device that feels more agile and nimble, giving an amplified impression of lightness.

Article Link: iPhone 15 Pro Likely Feels Even Lighter Than It Really Is Due to Inertia Change
Click to expand...
old stuff-Xperia Z ultra circa 2013 and that was without titanium
 
The difference in weight might be small the difference in force required to manipulate the phone will be tiny and probably trivial. While true in physics the threshold of human perception might be exceeded here.
 
The weight distribution of the components probably outweighs (pun intended) the reduction in perimeter weight?
 
Makes sense and is a big plus.

Will be a welcome change from my 14 PM - especially for making photographs.
 
“An now I got a special guest to talk to you ALL about momentary tersha of the new phones, and he’s Dr. Drangle”
—Steve Brule
 
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