Boxing Training Guide: Weight Classes, Bags and Pro Drills

Boxing training routines from legends like Muhammad Ali and Mike Tyson focus on speed bag drills and heavy bag work. Understanding boxing weight classes and equipment is vital for amateur and pro bouts.

Hand of boxer and punching bag over black background

How to Measure Force on a Punching Bag

Published Sep,08 2011 | By John Woloch

The force of an object is a product of that object's acceleration and mass. English physicist Isaac Newton introduced this fundamental identity of classical mechanics with his second law of motion, F = ma. F represents force; m represents mass; and the variable a represents acceleration.

John Woloch writes professionally for various websites. He has published in the Dutch journal "Crux" and writes frequently on oil painting, classical languages and topics involving math and biochemistry. Woloch holds a Master of Arts in English from the University of Chicago, a Master of Arts in classics from Ohio State University and a postbaccalaureate pre-medical degree from Georgetown University.