Force 05 : Force equals mass x acceleration. This is the external agency which changes or tends to change the conditions of rest or of steady linear motion of a rigid body
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}