Chu says that the strength of physics is that it starts by asking very, very simple questions. For example, just letting something fall to the ground looks pretty simple, but through asking what is actually happening, it is possible to come up with mathematical models and calculate the gravitational acceleration of the object so that we can understand the principles of gravity and attraction.
朱棣文認為，物理可以闡釋簡單的事物，例如，放手讓一件物品滑落，是件看似簡單的事情，但透過數學模式，卻能計算出物體下墜的重力加速度，讓我們瞭解重力、引力的原理，甚至可以延伸到製造航空器、探測太空等用途上。