FOR A MOMENT, THINK OF AN AIRPLANE MOVING FROM LEFT TO RIGHT AND THE FLOW OF AIR MOVING FROM RIGHT TO LEFT. THE WEIGHT OR FORCE DUE TO GRAVITY PULLS DOWN ON THE PLANE OPPOSING THE LIFT CREATED BY AIR FLOWING OVER THE WING. THRUST IS GENERATED BY THE PROPELLER AND OPPOSES DRAG CAUSED BY AIR RESISTANCE TO THE AIRPLANE. DURING TAKE OFF, THRUST MUST BE GREATER THAN DRAG AND LIFT MUST BE GREATER THAN WEIGHT SO THAT THE AIRPLANE CAN BECOME AIRBORNE. FOR LANDING THRUST MUST BE LESS THAN DRAG, AND LIFT MUST BE LESS THAN WEIGHT.
There are two kinds of piloted balloons: free-floating and powered. The hot-air balloons that people ride in for fun, as at the Balloon Fiesta, are free-floating. A free-floating balloon cannot be steered. The pilot can only make the balloon go up or down. By doing so, the pilot can try to catch air currents that will move the craft in a desired direction.
They are, thrust, the forward motion or speed of the paper airplane, for our paper airplanes this is provided by your throwing the plane forward. Second is drag, which is the resistance of the aircraft against the wind. Third is gravity, the force that pulls down all things on the Earth. To alleviate this force an object needs to become light in weight. Last is lift, where the push of the wind under the wing is greater than the push on top of the wings.
And as the coaster train goes down the first hill, all the stored potential energy is transferred into kinetic energy. And it is also where the max kinetic energy is. It goes over the second hill and then up the loop and as it is at the top of the loop it has a high potential energy and then that energy is transferred into kinetic energy as the coaster train goes through the rest of the track. Coaster tracks serve to channel this force – it controls the way the coaster car moves and where it goes. Like at the bottom of the first hill as the car goes up the hill gravity pulls on it, so that it decelerates.
NCSU – Dept. of Chemistry – Lecture Demonstrations Gas Law / IMF Common Gas Law Experiments Collapsing Balloon (Charles’ Law) Description: A filled balloon shrinks when immersed in liquid nitrogen. Materials: Liquid Nitrogen Dewar Insulated Gloves Procedure: Carefully fill dewar with N2 (l). Add balloons to the dewar (suitcase analogy often used). Remove balloons with tongs to show the decrease in volume of the gas inside.
Van de Graaf Generator Activities Activity 1: Explain that the globe of the generator builds up excess electrons through conduction. The built electrons are repelling since they are like charges and we know that like charges repel so they are spread out as much as possible. The charges are spread out because the globe is a conductor, unlike electrons that are rubbed onto the balloon, which stay in the general area where you rub the balloon. Activity 2: The electrons are in an excited state because of mutual repulsion, which means that they are looking for a place to go where the electron population is not so dense. Since the electrons are excited they will jump to anything that comes close to the generator globe, such as your hand, the desk,
They changed because the molecules of hydrogen and helium were moving so fast that they eventually escaped the Earth. 14. Explain how the greenhouse effect works and how it relates to global warming. The greenhouse effect is when radiation at visible wavelengths passes freely through the atmosphere and is absorbed at the ground. The ground heats up and emits infrared radiation.
a. the space shuttle as it is orbiting Earth b. a car turning a corner c. the space shuttle when it is being launched d. a bike moving in a straight line at a constant speed 3. If you triple the net force acting on a moving object, how will its acceleration be affected? ______ 4. The gravitational force between two objects depends on which of the following? a. each object’s mass c. the distance between the objects b. each object’s volume d. both (a) and (c) 5.
There is an unlimited amount of space above us. If we could make use of this space, we could eliminate traffic. I propose a device that could be attached to our cars, giving them the ability to fly. If memories of the airborne vehicles from The Jetsons are coming to mind, then we’re on the same page. Let’s call the device “The Automobile Air Enabler” or “Air Enabler” for short.