What does “use f=ma, where a=v-u divided by t”mean

Newton  ng on an object is equal to the mass (    m    ) of an object times its acceleration (    a    ). This means the more m    a                                              ss an ob ject h s, the more force you need to accelerate it. And the greater the force, the gre ater the obj ect's accele ration.

the higher the current the higher the mag field around it the higher the influence on the compass