Forces in Equilibrium

When **forces**
are in equilibrium, the resultant **force**
is zero.
According to Newton's Second Law, a **force**
on an object can be equated to the product of its **mass**,
m, and **acceleration**,
a. Hence, if the **mass**
of the object, m, is not destroyed, the **acceleration**
of the object, a, must therefore be equal to zero. The object is
either stationary or moving at a constant **velocity**.

As**forces**
are **vector
quantities**, they can be represented with the use of
arrows. When three **forces**
are in equilibrium, they follow *the triangle of forces rule*
which states that the three arrows can form (make) a closed
triangle. The direction of the arrows follow one another, as shown
in the diagram below. The triangle of forces rule, for instance, can
be used to solve many textbook questions, including the ones
involving the **weight**(s)
required in a pulley system which is in equilibrium.

Besides the triangle of forces rule, questions involving**forces**
in equilibrium can also be solved using parallelograms and/or **trigonometry**.

As

Besides the triangle of forces rule, questions involving

Daya Seimbang