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A high-flying jet cruises at an altitude of 30000 feet at a constant velocity of 700 kmhr. The force of the jet engines is 40000 Newtons. How much air drag acts on the craft?
Wiki User
∙ 8y ago
Here is a hint: you can use Newton's Second Law for this one. The airplane can only go at a "constant velocity", i.e., zero acceleration, if the net force is also zero.
Wiki User
∙ 8y ago
Niko
40,000 N
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Example of Air resistance?
Calculate drag coefficient of freefaller (prior to chute opening)>(constant) force down (in newtons) due to gravity = mass * acceleration due to gravity, say 80 * 10 = 800 newtons.>The up force (newtons) = velocity2 * drag coefficient>At terminal velocity (where up and down forces balance) the up force = 800 newtons, say terminal velocity = 70 metres / second>800 = 4900 * drag coefficient>Drag coefficient = 800 / 4900>Drag coefficient = 0.163
What is sir Isaac Newtons 1 law?
Of the Newtons laws of motion the first one states that:(quoting Newton)...every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. The key point here is that if there is no net force acting on an object (if all the external forces cancel each other out) then the object will maintain a constant velocity. If that velocity is zero, then the object remains at rest. If an external force is applied, the velocity will change because of the force.
What law of motion is it when stopping a car you are thrown forward?
Newton's first law of motion states that any object at equilibrium, i.e. stationary or at constant velocity, will continue in that state unless acted on by a force. In reality, you are not thrown forward in the car. Its a matter of perspective. The car decelerates, i.e. force in negative direction to velocity due to friction from the brakes, and you continue moving forward until you reach whatever restraint is going to force you also to decelerate.
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 is the velocity after three seconds when a force of 25 newtons acts on a 10 kg body at rest?
25 N acting on 10 kg increases the velocity by 25/10 metres per second, every second, so after 3 seconds the speed is 7.5 metres per second.
Is it true that an object in motion at a constant velocity will change its motion only if a central force acts on it?
yes it is one of newtons laws of motion
What is the number of newtons is the gravitational force minus the number of newtons for the drag in water?
The gravitational force in water is the weight of an object, given by the formula: (F_{\text{gravity}} = m \times g), where (m) is the mass of the object and (g) is the acceleration due to gravity. The drag force in water is given by: (F_{\text{drag}} = \frac{1}{2} \times C_d \times A \times \rho \times v^2), where (C_d) is the drag coefficient, (A) is the cross-sectional area of the object, (\rho) is the density of water, and (v) is the velocity of the object. To find the net force: (F_{\text{net}} = F_{\text{gravity}} - F_{\text{drag}}).
Witch one of newtons laws states that every onject maintains constant velocity unless acted on by an unbalanced force?
Newton's first law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by a net external force.
How can you increase the velocity of thre ore?
You can increase the velocity of an ore by using mechanical processes such as crushing, grinding, and agitation to break down the ore into smaller particles and increase its surface area, allowing for faster reaction rates. Increasing the temperature can also help accelerate the velocity of ore processing reactions. Additionally, adding catalysts or optimizing the chemical composition of the ore can further enhance its reactivity and speed up the processing.
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 is the only force acting on objects in freefall?
constant force down (newtons) = mass (kgs) * acceleration due to gravity (m/s/s) > increasing force up (newtons) = velocity (m/s) 2 * objects drag coefficient
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).
Who invented velocity?
The concept of velocity was developed by Galileo Galilei, an Italian scientist and mathematician, in the 17th century. He introduced the idea to describe the speed of an object in a specific direction, which is now a fundamental concept in physics.
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.
Why an object moves with uniform speed even if two forces acting on it in opposite directions are equal?
According to Newtons 1st law of motion, a body moving with constant velocity will move with it until an external force compelled it to change its velocity or which is also known as the Inertia of motion. As two equal and opposite forces acting on it , the net external force is zero, so it will move with constant velocity.
What is the magnitude of the apparent weight of a 67kg astronaut 4400km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
The force on the astronaut and the moon = 16.97 newtons (1.73 kilogram force)
What is the formula of velocity ratio?
Effort force:Load force. For example, if you put in 10 newtons of force and the load force was exerting 5 newtons the velocity ratio would be 2:1
