Examples of balanced forces include the centripetal and centrifugal forces that keep the planets in fixed orbits around the sun, as well as weight and reaction forces that keep a book on a table. Balanced forces are forces that are equal in magnitude and opposite in direction.
The net force acting on a body when forces are balanced is zero. When forces cancel one another, the object the forces act upon is said to be in equilibrium. Balanced forces are what cause objects to tend to remain in their states of motion.
When the forces acting on a body are balanced, this does not necessarily mean the object is stationary. The object may be traveling at a constant velocity relative to a certain reference frame. However, the body cannot be accelerating or decelerating, as this would require the presence of a net force, according to Newton’s Second Law.
Weight and a corresponding reaction force from a solid surface are examples of balanced forces. A person standing on a floor is pulled downwards by the Earth’s gravitational field, causing them to exert a force equal to their mass times their acceleration on the floor. The floor reacts with an equal and opposite force, causing the person to remain in equilibrium.Learn More
Coplanar forces are forces on a single plane. This means that all points of application are inside that plane and that all forces are running parallel to that plane.Full Answer >
The force of gravity is the only force that keeps a standard hanging pendulum in motion. It is both the force that increases the speed of the pendulum on its downswing and decreases its speed on its upswing. The force of friction from air is the major reason that the arc of the pendulum's swing diminishes over time.Full Answer >
The formula to calculate buoyant force (FB) states that the upward force exerted on an immersed object is equal to the density (ρ ) of the fluid multiplied by both the fluid’s displaced volume (V) and the gravitational acceleration (g), or FB = ρ x V x g. Buoyant forces are the reasons why objects either sink or float in a fluid.Full Answer >
According to The Physics Classroom, the net force is the vector sum of all the forces acting on an object. Forces, as vectors, are measured in terms of magnitude and direction.Full Answer >