Free vibration ofa system is vibration that occurs in the absence of external force. An external force that acts onthe system causes forced vibrations. In this case, the exciting force continuously supplies energyto the system. Forced vibrations may be either deterministic or random (see Fig.
Of course it's your name--I learned that in 8th grade. Now for one (the first) from 7th grade and one from college (the second). 1. What do you have when you sit down and lose every time you stand up? 2. What is it that men do standing up, but women are allowed to do while sitting down? (A warning: this is suitable for mixed company, but maybe not for mixed-up company.) This is about as close as I'd come to probable offenses on this site.
hand. Your hand is the part of your body at the end of your arm. It includes your fingers and your thumb. Don't refer to a particular person's hand as 'the hand'. Say his hand or her hand. You refer to your own hand as my hand. The young man held a letter in his hand.