两者的区别：physics作名词意思有物理学；物理过程；物理性质。名词修饰其他名词必须形成专有名词，比如physics lab 物理实验室。physical作形容词意思有物质的；身体的；体力的；物理的；肉体上的，身体上的。比如 physical work 体力活。
physics
造句：He has got brilliant achievements in the field of physics。他在物理学领域取得了辉煌的成就。She majored in maths and physics at university。她在大学主修数学和物理。Our place of study is in the Physics Laboratory。我们学习的地点在物理实验室。
physical
造句：Staying up late put his physical condition at a low ebb。熬夜使得他的体力状况处于低潮。We suggest that Smith be told about his physical condition as soon as possible。我们主张应尽快告诉史密斯他的身体状况。
Playing football is a very physical activity。踢足球是一项非常需要体能的运动。