# Some effects of Forces

After studying this section you should be able to:

- calculate the moment of a force and apply the principle of moments to a stable object
- calculate the density of a solid, liquid or gas
- calculate the pressure due to a force

After studying this section you should be able to:

- calculate the moment of a force and apply the principle of moments to a stable object
- calculate the density of a solid, liquid or gas
- calculate the pressure due to a force

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