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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?
That depends how fast the object moves. However, once it falls in the water at a constant velocity, you know that the net force - which is just what the question is after - is zero.
Witch one of newtons laws states that every onject maintains constant velocity unless acted on by an unbalanced force?
I think it's the third one.
How can you increase the velocity of thre ore?
We can use Newtons 2nd law to figure this out. The formula is Force (Resultant) = Mass x Acceleration. The ores mass is constant. If you use a greater force, working out the formula, the velocity increases.
What forces work on a skydiver?
(standard air pressure and gravity)>(Constant) Force down (newtons) = mass * acceleration due to gravity>Say 70 kg skydiver @ 9.82 m/s/s = 70 * 9.82 = 687.4 newtons>Force up (newtons) = velocity 2 * drag coefficient (say 0.16 typical)>Terminal velocity (when forces balance) 687.4 = v 2 * 0.16Terminal velocity = square root (687.4 / 0.16)= 65.546 metres per second ( 147 mph) terminal velocity
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 person who discovered velocity was newton. so you should look up newtons theory on velocity.
What two factors affect air resistance on a falling object?
constant force down (newtons) = mass (kg) * acceleration due to gravity ((m/s)/s) > variable force up (newtons) = velocity2 * drag coefficient > terminal velocity is where forces balance
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
