If a body is in equiliburium under a set of non-collinear forces, then the minimum number of forces has to be

If a body is in equilibrium under a set of non-collinear forces, then the minimum number of forces has to be

For a body to be in equilibrium under the combined action of several forces

For a body to be in equilibrium under the combined action of several forces

A body is in equilibrium under the influence of a number of forces. Each has a different line of action. The minimum number of forces required is.

A body is in equilibrium under the influence of a number of forces. Each has a different line of action. The minimum number of forces required is.

If a body is set into vibrations with a strong external force, the vibrations are

If a body is set into vibrations with a strong external force, the vibrations are