Kusog

Ha pisika, an kusog o force, pwersa (Pambansa:Lakas) amo an nagpapabalyo o may kapas magbalyo han estado han diri pagkiwa o kiwa han usa ka butang.

Pinanbasaran

Padugang nga barasahon

Mga sumpay ha gawas

 Video lecture on Newton's three laws  by Walter Lewin from MIT OpenCourseWare
 A Java simulation on vector addition of forces
 Force demonstrated as any influence on an object that changes the object's shape or motion (video)

gd:Neart