To minimize unwanted forces on the test object, you will use an air track (see Fig. 1.1). The glider floats on a cushion of air above the track, eliminating most of the friction between the glider and the track.
What forces are acting on the glider on the air track?
Compared to a powered aircraft, we see that a glider has only three main forces acting on it: lift, drag, and weight. As before, we have collected all of the component forces together and represent them by single forces acting through the center of gravity or the center of pressure.
What might excessive air pressure cause the glider to do on the track?
Excessive air pressure may cause the glider to wander on the track, even in the absence of an accelerating force. The Air Supply will slightly heat the Air Track, causing it to expand. The adjustment beam under the track has been set such that the track will be straight to +/- .
What are gliders made out of?
Gliders were mainly built of wood and metal but the majority now have composite materials using glass, carbon fibre and aramid fibers. To minimise drag, these types have a fuselage and long narrow wings, i.e. a high aspect ratio.
What kind of motion does the glider undergo?
The glider moves with what seems to be a constant speed motion.
Does changing the mass of the glider affect acceleration?
Because the acceleration due to gravity is a constant, and affects all masses identically, the mass of the glider does not affect its acceleration down the air track.
Why does air track have an inclination?
Gravity, since it acts along a line perpendicular to the track, has no component in the direction of motion. For this demonstration, you tilt the air track to some angle, θ, relative to the horizontal, so that the gravity is no longer perpendicular to the track.
How the acceleration of the glider depends Mathematically on the forces exerted on it and its mass?
It simply states that the force on an object is equal to the mass of the object times its acceleration. In the experiment to follow, a glider will be connected to a falling weight by a pulley.
What are light gates?
The Light gate is a digital switch-type sensor most commonly used in timing experiments. The Light Gate has an infrared transmitter and receiver that will detect an object passing through the ‘gate’. They can be used singly or in pairs for time, speed , velocity, acceleration and event monitoring.
Do air tracks remove friction?
Compressed air is injected into the cavity beneath the track. Since this cavity is sealed, the air can only escape through the small holes on the track itself. This provides a force strong enough to lift the gliders, which drastically lowers friction.
How does the air cushion affect the glider?
The trapped air currents can create an air cushion on any smooth surface, land or water! The cushion greatly reduces friction, allowing the vehicle to glide freely over the smooth surface below. Pop-top lid from a plastic drinking bottle.
Why is a bowling ball better for knocking down pins?
1. Why is a bowling ball better for knocking down pins than a ping pong ball? A bowling ball is much more massive than a ping pong ball.
What is the purpose of the compressed air jets along the track?
Compressed air is sprayed from the holes and forms a thin layer on the surface of the track. This layer fills the space between the air track and the inner surface of a glider. As a result, the movement of the glider can be regarded as almost friction-free.
Why is it important that the air track be perfectly level?
To study motion with constant velocity it will be necessary to level the air-track as carefully as possible so that the rider does not tend to accelerate in one direction.
What are several advantage of using an air track?
Air Tracks are very easy to carry from one place to another. They are very light and can easily be fit in a car, which means you can take them with you whenever you want. They feature rapid inflation and deflation, are easy to set up, and kids can manage them conveniently as they are lightweight and easy to store.
Why do you need an inclined plane to measure the effects due to gravity?
Most falling objects move quickly. … The inclined plane thus allowed Galileo to accurately measure acceleration with simple instruments and ultimately to prove that, in the absence of other forces such as air resistance, gravity causes all falling objects to accelerate toward Earth at the same rate.
Which force acting on the glider causes it to accelerate?
The glider’s inertia causes its resistance to acceleration when launched. A net external force on an object will cause it to accelerate, which explains the glider’s acceleration during launch. The force meters are essentially scaled-down versions of the glider launcher that will be used in the culminating project.
What’s the difference between acceleration and force?
Force is a push or pulls that an object exerts on other objects. Acceleration is the rate of change of the speed of an object, so if an object has mass, and it is accelerating through space, then the object is said to exert a force.
How do gliders take off?
An engine powers a large winch on the ground and a long cable connects the winch to another release mechanism located on the underside of the glider. When the winch is activated, the glider is pulled along the ground toward the winch and takes off, climbing rapidly.
How do gliders stay in flight for several hours?
Gliders can remain flying as long as there is lift available. Using thermals, this is about 8 hours. By using prevailing winds blowing up a slope, a glider can be flown for as long as the wind is blowing.
How do you get Glide?
A shortcut way to compute glide range in nautical miles for any given glider is to divide the published glide ratio by 6. So, an aircraft with a 24:1 glide ratio will go 4 NM, one with a 54:1 glide ratio will go 9 NM, etc.