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Why can friction make observing newton's first law of motion terminal velocity?
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∙ 12y ago
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∙ 12y ago
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Explain why friction changes the the Velocity of objects and why friction can make observing Newton's first law of motion difficult?
newtons laws are idealised and don't involve external forces like friction and air resistance
What forces work on a skydiver?
The main forces acting on a skydiver are gravity, which pulls the skydiver towards the ground, and air resistance (also known as drag), which opposes the skydiver's motion and slows down their fall. Additionally, the skydiver's own body position and movements can influence their descent.
What unit do you measure friction in?
you measure friction in Newtons
How is algebra used in skydiving?
Fnet=Fgravity-Fair resistance At terminal velocity Force Net = 0 during this time Fgravity = Fair resistance if you weight is 85kg Fgravity = Mass x G = 85x 9.8 = 833N your at terminal velocity when Air resistance is equal to 833 Newtons
The blank is reached when the force of gravity is balanced by air resistance the size of the air resistance force depends on the shape of an object and it's speed?
yes force down in newtons = (mass * acceleration due to gravity) constant force up in newtons = ( velocity^2 * drag coefficient) increases with velocity until terminal velocity reached, forces balance , no further acceleration. if mass(m) and terminal velocity(tv) are known, drag coefficient(dc) can be calculated. if : (m * g) = (tv^2 * dc) so: dc = (m * g )/( tv^2) drag coefficient is dependent on shape and texture, and is exclusive to each object. air resistance to motion increases as to the square of velocity
What is the net force that acts on a 10-N falling object when it encounters 4 N of air resistance?
Fnet= mg-R Fnet= (10-4)= 6 So the net force is 6 N. :)
When a 10 newton falling body encounters 4 newtons of air resistant the net force on the body is?
6 newtons, so it keeps accelerating. As it does, the air resistance increases until it reaches 10 newtons so then the net force is zero and then the fall continues at constant speed (the terminal velocity).
How does friction prevent us from observing Newton's First Law in the real world?
As we roll down a marble on a horizontal floor with some velocity then it is expected to keep rolling on with the same velocity (both magnitude and direction to be constant). But it is brought to rest. So out of two parts in Newtons's first law, the second part cannot be easily demonstrated. That part says that unless an external force acts the uniformly moving body continues to do so.
What is an example of terminal velocity?
An example would be "any object that is moving through the air, water or other substance at a rate such that it cannot possibly go faster without additional force being applied." "Terminal Velocity" in dropping a rock from an airplane might mean "the fastest the rock can possibly fall on its own." Once the rock reached that velocity, it would not be able to go faster despite that it had accelerated to that point without additional force (or increased gravity) being applied to the rock. rock from plane when force down = force up force down = mg (newtons) force up = force of air resistance (velocity ^2* drag coefficient ) newtons. you can use known terminal velocity to calculate drag coefficient if mass is known.
What two factors affect air resistance on a falling object?
The two main factors that affect air resistance on a falling object are the speed of the object and the surface area of the object. At higher speeds, air resistance increases, slowing down the object's descent. Objects with larger surface areas experience more air resistance, which also slows down their fall.
How do the resistance and the weight of a falling object compare when terminal speed is reached?
When an object reaches terminal speed, the air resistance acting on the object becomes equal and opposite to the weight of the object. This balance causes the net force on the object to be zero, resulting in a constant velocity. Therefore, at terminal speed, the resistance and weight of the object are equal in magnitude.
What is Laws of Dynamic friction?
The laws of dynamic friction describe the relationship between the force required to overcome friction between two surfaces in motion and the normal force acting perpendicular to those surfaces. These laws state that the force of friction is proportional to the normal force and is independent of the surface area in contact, while the coefficient of friction relates the force of friction to the normal force.
