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Air resistance.
Friction always acts in a direction opposing the motion of an object.
In free fall is should be gravity, obviously if an object is falling it should be gravity.
The forces are balanced because they are falling at a constant speed. According to Newtons first law of motion an object will keep moving unless an unbalanced or net force acts upon it. If we may step in here for the novel purpose of answering the question . . . The balanced forces on an object that is falling with constant speed are typically the force of gravity (the object's 'weight') and the equal and opposite force of air resistance.
changes the motion of the object
Ten newtons downward, by definition.
Air resistance.
The forces acting on a falling body are gravity and air resistance.
Gravitational potential energy
Friction always acts in a direction opposing the motion of an object.
In free fall is should be gravity, obviously if an object is falling it should be gravity.
The net force is the difference between the 10N falling object and the 4N of air resistance So you solve 10N-4N is 6N
the net force is 10N - it is acceleratiing with gravity - if no air resistance. If it falls far enough, eventually air resistance will balance the force and net force will be zero - it will fall at constant velocity and zero acceleration
The forces are balanced because they are falling at a constant speed. According to Newtons first law of motion an object will keep moving unless an unbalanced or net force acts upon it. If we may step in here for the novel purpose of answering the question . . . The balanced forces on an object that is falling with constant speed are typically the force of gravity (the object's 'weight') and the equal and opposite force of air resistance.
changes the motion of the object
The force of gravity is the primary acting force. Air resistance acts in the opposite direction.
A push or pull that acts on an object is a force.