If you're in a situation where you need to silence your phone, you can continue to receive new email alerts by turning on the phone's vibration feature. 1  1. Tap Settings on the iPhone's home screen. 2  2. Touch Sounds, then tap the Vibrate switch to set it to On.. 3  3. Tap Settings to return to the Settings screen.
Here is the derivation of that D2/162.2, Weight of steel bar per meter = Area of the steel x Density of steel x Bar length. = (3.14 x D2 /4) x 7850 kg/m3 x 1m (refer these posts basic formulas & unit weight of materials) = (D2 x 6162.25)/(1000 x 1000)
But this isn't always the case because most modern smith machines have the barbell set up on pulleys and this actually reduces the weight of the barbell. How much does the bar on the smith machine weigh? The typical smith machine barbell only weighs about 15 pounds when you factor in the pulley set up. Whereas a free weight barbell weighs 45 pounds. So if you have the same weight plates on a smith machine compared to a barbell it's going to feel lighter simply because you are lifting less weight.