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A force is a push or a pull acting on an object.
A single force acting on an object can change its speed, direction, or shape.
Tension is a type of force that stretches an object.
Compression is a type of force that pulls objects apart.
Friction opposes the motion of objects.
Solid friction occurs between surfaces of solid objects that are sliding or trying to slide across each other.
Friction (drag) only occurs in solids.
A skydiver experiences balanced forces when falling at terminal velocity.
Balanced forces result in a net force of zero on the object.
If forces acting on an object are balanced, the object will accelerate.
Unbalanced forces cause a change in the speed or direction of an object\’s motion.
The resultant force is the total of all forces acting on an object.
If the resultant force on an object is zero, the object must be at rest.
If an object is already traveling at constant speed, it will continue at that speed if no resultant force acts on it.
Balanced forces on an aircraft result in no change in its direction or speed.
The force of friction always acts in the direction of motion.
A balanced force scenario is when two forces of equal magnitude and opposite direction act on an object.
An object moving at constant speed is an example of unbalanced forces.
The forces acting on an aircraft in steady flight are balanced.
During take-off, the thrust force of an aircraft is less than the drag force.