Air resistance is probably best explained when compared to parachuting.
There is quite a bit of physics involved in skydiving, but lets start with the basics. Once you leave the plane there are essentially only two forces acting on you: gravity pulling you down, and air friction. The friction with the air mostly adds up to push in the opposite direction from the direction you are moving, so basically it pushes up on you and your equipment.
Air resistance increases as your speed increases, so when you first start dropping and are moving slowly, gavity is stronger than the air resistance and you speed up, accelerating towards the ground. However the faster you drop, the stronger the air resistance is and so eventually you are moving so fast that the air resistance is equal in strength to gravity and you don't accelerate any more. You have reached terminal velocity for your current body position.
Why does body position come into it? Because air resistance also depends on the shape of the object (you) and so by tucking in your arms and legs you can reach a faster terminal velocity than if your arms and legs are spread out. But skydivers don't splay their arms and legs to slow down per se. They are trying to achieve a position of dynamic stability.
Dynamic stability is what allows an arrow to fly nose first. If the arrow starts to flip sideways, the air resistance against the fletching is greater than the resistance at the nose, and the arrow automatically goes back to its initial orientation. Likewise, skydivers don't want to be tumbling end over end and out of control, so they trail their arms and feet behind them to act like the feathers on the arrow.
Upthrust is easier explained with hot air ballooning. Upthrust is the force that is pushing an object up rather than down. The hot air displaces a balloon, producing upthrust. This upthrust is balanced by the weight of the balloon.
The balloon displaces a volume of air equal to its own volume. The air displaced is heavier than the air in the balloon as hot air is lighter than the cold air of same volume.
As the upthrust produced is the same as the weight of the air displaced, the force of the upthrust is greater than the weight of the balloon. Thus, the balloons keep rising till the upthrust is equal to the weight of the balloon acting downwards.
The upthrust of an object can be measured by determining the difference between the object's weight in air and its weight when immersed in a fluid. This difference in weight is equal to the upthrust force acting on the object. It can be calculated using the formula: Upthrust = Weight in air - Weight in fluid.
If enough upthrust is added to an object then it will be pushed upwards. If enough air resistance is applied to an object then it will move in the direction which the air resistance is pushing it in. If you are already falling, then you will have air resistance. If it is increased when you open a parachute for instance, then you will slow down.
Upthrust is the force acting opposite to the weight of an object submerged in a fluid, while buoyancy is the upward force exerted by a fluid on an object that is partially or fully submerged in it. Upthrust is a component of buoyancy and it represents the difference between the weight of the fluid displaced by the object and the weight of the object itself.
The force that acts against upthrust is gravity. Gravity pulls objects downward, opposing the buoyant force provided by upthrust.
Friction, weight, and air resistance are forces that can slow things down. Friction opposes the motion of objects sliding past each other, weight is the force due to gravity pulling objects downwards, and air resistance is caused by air pushing against objects moving through it. Upthrust, also known as buoyancy, is a force that opposes weight but typically does not slow objects down.
The upthrust of an object can be measured by determining the difference between the object's weight in air and its weight when immersed in a fluid. This difference in weight is equal to the upthrust force acting on the object. It can be calculated using the formula: Upthrust = Weight in air - Weight in fluid.
If enough upthrust is added to an object then it will be pushed upwards. If enough air resistance is applied to an object then it will move in the direction which the air resistance is pushing it in. If you are already falling, then you will have air resistance. If it is increased when you open a parachute for instance, then you will slow down.
Air resistance or upthrust :)
Upthrust is the force acting opposite to the weight of an object submerged in a fluid, while buoyancy is the upward force exerted by a fluid on an object that is partially or fully submerged in it. Upthrust is a component of buoyancy and it represents the difference between the weight of the fluid displaced by the object and the weight of the object itself.
The force that acts against upthrust is gravity. Gravity pulls objects downward, opposing the buoyant force provided by upthrust.
Centripetal, Centrifugal, Upthrust, Drag, Gravity, Air Resistance and Thrust.
Friction, weight, and air resistance are forces that can slow things down. Friction opposes the motion of objects sliding past each other, weight is the force due to gravity pulling objects downwards, and air resistance is caused by air pushing against objects moving through it. Upthrust, also known as buoyancy, is a force that opposes weight but typically does not slow objects down.
Friction upthrust occurs when an object moves through a fluid (like water or air) and experiences an upward force due to the fluid's resistance. This force helps to counteract the weight of the object, making it appear lighter.
Air resistance is the force that opposes the motion of an object as it moves through the air. Velocity, on the other hand, is the speed and direction of an object's motion. Greater air resistance can slow down an object's velocity by exerting a force in the opposite direction.
The difference between free fall and terminal velocity i that free fall is when an object is falling or descending through the air with little air resistance or drag. Terminal Velocity, on the other hand is when the resistance of air and the force of gravity balance each other out causing the object to reach a constant velocity. .
The net force would be the difference between the applied force and the air resistance. If the applied force is greater than the air resistance, then the net force would be in the direction of the applied force. If the air resistance is greater than the applied force, then the net force would be in the opposite direction.
The net force is the difference between the 10N falling object and the 4N of air resistance So you solve 10N-4N is 6N