BALANCED AND UNBALANCED FORCE

• An unbalanced forces system will have some form of motion as it has an overall change in momentum.
• A balanced forces system has no overall movement, so there is no acceleration or deceleration.
• The force that acts on an object is called the resultant
• A balanced force system is when the resultant force acting on an object is zero, so there is no net force acting on the object
• Inertia - The tendency to resist changes in velocity or direction of movement
• Newton's first law states that if an object at rest stays at rest unless acted upon by an external force, and if an object moving with constant speed continues to move at that speed unless acted upon by an external force.
• The resultant force can be calculated using the equation Fresultant = F1 + F2
• Forces are vectors which means they have both magnitude and direction.
• If the resultant force is zero then the object will remain stationary (no net force). If the resultant force is not zero then the object will move with constant velocity (net force)
• If two forces are acting at right angles to one another they can be resolved into their components along perpendicular axes.
• Forces can be represented by vectors which show direction as well as magnitude.
• When two forces act together, the total effect of both forces combined is known as the resultant force.
• If the magnitude of one force increases, then the other must decrease to keep the total force at zero