Variables
Controlled Variables
Variable Why it was controlled? How it was controlled?
Mass attached for all parachutes It was controlled because the initial downward force had to be kept constant so air resistance will be the only factor. It was controlled by using the same 2 50g (0.05kg) bolt for each parachute, and all bolts were weighed on a mass balance
Height of drop The height at which all the parachutes is dropped is kept constant because at higher heights the mass would have higher potential energy because GPE=mgh, but the only testing factor is air resistance so it would be unfair to drop some parachutes at higher heights as the have more time to increase air resistance. This was controlled by attaching a ruler to the drop site so
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The variation in the flow of air in the room caused parachute to land on slightly different places in different trials due to variation in the drag force experienced by the parachute. The movement of air and hence its effects cannot be controlled but could be lessened by blocking the air from outside. It is important to shut down doors and windows of the room and closing down the fan prior to the experiment.
Dependent Variable
The variable that will be measured is rate at which terminal velocity is reached. This will be done by timing and videoing the drop for each parachute, making markers for different heights, and calculate the acceleration at each marker. By doing this I will be able to identify the rate of decrease in vertical acceleration and how fast the object will reach terminal velocity. Thus answering the question and identifying the best shape of parachutes for different situations.
Independent Variable
The variable that will be changed in the experiment is the shape of the parachute used. However, the surface area, mass attached to the parachute and type of material used will be kept constant. This will ensure that the only altering factor is the shape of the
As a simple case, consider the simulation of document . In the frictionless case, the only force acting on the skater is gravity. Therefore, according to the conservation of energy, the sum of the kinetic and the potential energy remains constant. As the skater climbs the ramp, his height increases. According to document , as the skater’s potential energy is proportional to his height, the skater’s potential energy increases. However, the skater’s velocity also decreases as he climbs the ramp. Again, according to document , as the skater’s kinetic energy is proportional to his velocity squared, the skater’s kinetic energy decreases. The interplay between these two energies is such that their sum remains constant and the law of conservation of energy remains
The Purpose of this lab is to use the impulse and momentum concepts to explain what happens when the eggs are dropped onto various objects.
This is achieved when the diver takes the first leap into the air with his arms raised. When he comes back down on the board, his own mass falling onto the board will apply a certain force. An additional force is added as the arms swing down at the same time with a greater acceleration, applying more force. At the bottom of the diving board's oscillation, all of the now stored potential energy is released. The diver swings his arms upward and begins to release his pressure on the board. The board pushes the diver up and into the air with a huge force.
To investigate the affect the material of a ball has on the bounce height of that ball where the drop height (gravitational potential energy), temperature, location, ball, and air pressure of the ball are kept constant.
This experiment introduces kinematics, an important physics concept describing objects in motion, to explore projectile motion in two dimensions. The kinematics of motion can be expressed by certain equations, which show the relationships between velocity, acceleration, time, and displacement. Two experiments were conducted to utilize two specific equations; one by launching a ball horizontally to investigate the time of flight, and another by launching the ball at different angles to determine its horizontal range. A projectile launcher was used to carry out both experiments, along with a flight pad (for the first experiment) and a landing site (for the second experiment). When all the final values were calculated and gathered, the results
From what the video has achieved, however, one could argue that the video is more about categorising the purpose of the falls by the content of the plots, rather than revealing the purpose of having the falling scenes as a cinematic narrative technique. The motivation of this video just reminds me one theory in Linda William’s article, Film Bodies: Gender, Genre, and Excess, in which she argues that any impacting actions or behaviors bear the purpose of manipulating the audience’s body at a sensational level which recalls the tactile memory of the audiences themselves in order to create the sense of immersion. Technically, this is my reading of why do films often tend to have all types of falling scenes because they create intension and arise curiosity about whether or not the character is still
The higher an object is held, the more potential energy it has (if it is going to be dropped). When that object, such as the basketball, is dropped, its potential energy is converted into kinetic energy. The closer the ball gets to the ground, the more its potential energy decreases and its kinetic energy increases. The reason the ball does not bounce up all the way back to its original drop point is because when it hits the surface, some of its kinetic energy is “l...
If you're going to build a 62,000 km rope, what would you use?. This application ends up being
Possible sources of error in this experiment include the inaccuracy of measurements, as correct measurements are vital for the experiment.
In free fall motion, we can derive the equations using the Kinematic Equations for Constant Acceleration.
We did not have a specific place on the ramp at where we would drop the mass pieces onto the trolley. We just dropped them anywhere on the ramp. The position of the collisions was different for all three trials which might have affected the results because the distance after the collisions was different for every collision. There was no consistency.
Planning and Method. Any experiment needs variations as well as fairness to be a true success. The two variations I will include in this experiment shall be: 1) The number of paperclips on the bottom of the helicopter. 2)
braking system slow, so the riders don’t go into shock, but fast enough to be fully stopped before
Skydiving has been around since ancient Chinese times as a form of aerial stunts. Leonardo da Vinci and the Chinese are both credited for creating the parachute, but it was really in the 18th century when France both created it and used it by basically throwing themselves out of planes. Little did anyone know that skydiving would be one of the craziest sports today. Jumping out of a plane two and a half miles up into the sky would not be someone’s idea of a normal day. As bad as two and a half miles up in the sky is, try doing it traveling at a rate of one-hundred and sixty miles per hour with just a parachute to save you. To many people this would be a nightmare; but to some of us, it is the biggest thrill of our lives.