types of fores?
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examples of contact forces are : friction, tension, normal force
Anything that you can build,like say your buliding a house. BUILD is your answer
Forces and events inside the earth affect people because they have a bearing on what happens on the earth's surface. Earthquakes, waterfalls, and volcanoes are examples of occurrences that result from forces and events occurring inside the earth.
Coplanar just means that all forces act within a single plane, rather than in three dimensions. Examples aren't really necessary -- it's really a mathematical abstraction, because in the real world forces act in three dimensions.
The forces of tension and compression may work together by pushing the pieces of the bridge together. This can help ensure maximum even weight distribution, and ensure joint contact.