Strength of Materials
The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of

balance of force
forces
independence of forces
resolution of forces.

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Strength of Materials
In ideal machines

mechanical advantage is less than velocity ratio
mechanical advantage is greater than velocity ratio
mechanical advantage is unity
mechanical advantage is equal to velocity ratio

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