​book hold on table

1. what do you see in the picture?

2. ​what is the effect of these?

​forces

​1. what are the forces acting on the book?

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​2. write the characteristics of these forces?

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​3. is this book at rest? why

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​4. what do you conclude?

​more one force on object

​this box is at rest.

​what will happen if the forces will be

not equall?

discussion

​If we have paper and 2 people put forces opposite on it what will happen?

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​do you feel it is similar to the earthquake? haw?

​equations