isomatic
The feather is likely in a balanced state of forces where air resistance is equal to the force propelling it forward, such as a gentle breeze. As long as the forces remain balanced, the feather will continue at a constant velocity. This is a demonstration of Newton's first law of motion.
In physics, net force refers to the overall force acting on an object. A feather with no net force on it maintains constant velocity.
The force that maintains motion is inertia. Inertia is the tendency of an object to resist changes in its velocity. An object in motion will continue moving at a constant velocity unless acted upon by an external force.
The answer is very simple. The words "constant velocity" are the definition of zero acceleration.
An object will maintain a constant acceleration as long as the net force acting on it remains constant. This net force takes into consideration changes in mass, applied force, and air resistance. Any change in these factors will result in a change in acceleration according to Newton's second law of motion.
The ball returns to the ground with increasing velocity due to acceleration due to gravity. At a point (terminal velocity) the ball maintains a constant velocity (due to air resistance) This occurs when the weight of the ball is equal to the viscous drag of the air (air resistance) and upthrust (weight of air displaced).
The acceleration of the car is 0 m/s^2, since it is maintaining a constant velocity. Acceleration is the rate of change of velocity, and since the velocity is constant, there is no change in velocity and thus no acceleration in this case.
An object that moves with constant position will have constant velocity or acceleration. This is said to be moving in positive direction and maintains the position.
First
Terminal velocity occurs when the force of gravity pulling an object down is equal to the air resistance pushing up against it. At this point, the object stops accelerating and maintains a constant velocity. This happens when the drag force on the object becomes large enough to balance out the downward force of gravity.
Terminal velocity, where the driving force = drag force from the water
Air resistance increases as an object's speed increases. At terminal velocity, the upward force of air resistance equals the downward force of gravity, resulting in a constant velocity. The greater the air resistance, the lower the terminal velocity of an object falling through the air.