Chapter 2, Problem 16A

To determine

To explain: The difference between static equilibrium and dynamic equilibrium.

Explanation of Solution

Introduction:

Mechanical equilibrium is a state at which no physical change occurs.

In mechanical equilibrium the net force on an object is zero.

Show the expression for the equilibrium rule as follows:

  ${\displaystyle \sum F}=0$

Sketch the situation for the mechanical equilibrium as shown below.

  

The sum of the upward vertical forces is equal to the sum of the vertical downward forces.

The state of an object is at rest is said to be in static equilibrium. In which the velocity of an object is zero. The net force acting on the system is zero.

The objects moving at constant speed in a straight-line path is said to be the object is in dynamic equilibrium. The net force acting on the system is zero.