物理

The net force on the ball is zero.Do you know what's the they will mean no，it's me，no，it's me nothing they were lin，什么都沒有，什么都不是。It does not change its motion, not change its motion. Newton's the first law, if an object has zero net force, it does not change its意思就是小的英語嗎？這個下面嗎？Motion.Newton's first law one.This bone does have a net force. It never keeps. Yeah, that's right. It does change its motion.No no no no.This book has masks more masks, less maths.Hilton is that second floor to the net force is equal to mass times acceleration.Fourth equals mass.A celebration, the net force equal to mass times acceleration. The net force is equal to mass times acceleration. 力等于質(zhì)量乘以加速度。