Now,the other kinds of vector fields we have seen physically are force fields.

我们从物理的角度,研究的另一类向量场是力场。

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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。

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Hopefully most of you know that the electric field is a vector field that basically tells you what kind of force 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。

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In other words, the x, y location of the touch, the force or depth of the touch, and the vector direction of the touch (2 angles).

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