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What type of force needs to touch something to affect things?

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Does surface type affect the force of friction?

Surface types can affect the force of friction because as the surface gets rough and rougher it has more friction and smooth surface has less friction. if we compare the affec

What two things affect the charge of the electric force?

I'm not sure what this question really means - should it be more like "what two things affect the force between two electric charges?" If this is correct then the answer is pr
In Physics

What type of force is needed for motion to occur?

All forces can lead to movement. A ball falls from the sky because  of the gravitational force, but if we strap rockets to it the  thrust will also move it. Likewise for the