We have the cross-product of the position vector to this point times the force.
我们用这个点的,位置向量,乘以这个力。
2
Hopefully most of you know that the electric field is a vector field that basically tells you what kind offorce will be exerted on a charged particle that you put in it.
希望大多数人都知道电场是向量场,电场描述了,对场中的带电小颗粒的力的作用。
3
You know.. it’s not the length of the vector that counts… it’s how you apply the force