Unit 6: Force

Force is a _____ or _____ applied on an object.

Frictional force is the force produced when _____.

The direction of the frictional force always _____ the direction of movement of the object.

Factors affecting frictional force include:

Air pressure exists _____.

Air pressure is cause by _____ of _____ on the surface on an object.

Air pressure at the _____ of a mountain is lower than air pressure at the _____ of the mountain.