Investigation to find out whether changing Essay Example for Free

Investigation to find out whether changing EssayAir protection is a draw and quarter that acts upon all goal falling through the air. It slows the rate of crepuscle on an stain with any surface field of study. Scientific research has found that by altering the objects surface plain, the amount of air resistance either increases or decreases, changing the rate of descent. Newtons third law states that for every action there is an tinct and paired reaction. My chop leave fall to the land because of the gravitational pull of the Earth. In reflection to Newtons law, the opposite force in the case of my experiment testament be air resistance.As gravity is pull my helicopter to the ground, air resistance is pushing up onto my helicopter, slo denotation its rate of descent. The rate of gravity is eternally the uniform, as the gravitational pull from the Earth is the same, so the factor in this case, which affects the rate of descent, is air resistance. Newtons befrie nd law of motion states that the acceleration an object experiences multiplied by the mass of the object is equal to the assoil force acting on the object. Thus, if a given force acts on two objects of different mass, the object with the larger mass go forth nurture a lower acceleration.In the case of my experiment, the rate of descent on my helicopter, multiplied by the mass of my helicopter is equal to the total amount of forces acting on it. If the forces acting on my helicopter give a net force which is zero, then my helicopter will not accelerate, it will continue moving at a constant velocity. The forces on an object falling at terminal velocity are balanced. Terminal velocity occurs when the weight of an object is balanced by the drag. Drag depends on the speed of an object- the faster it moves the greater the drag.Therefore, if wiz of my helicopters is moving faster than another, then it will create more air resistance. Drag also depends on the shape of an object. A str eamlined object will travel much faster than another object, and they clear a lower terminal velocity. We prognosticate the force of gravity on something its weight. Weight (N) = mass (kg) x gravitational field strength (N/kg) The gravitational field strength on Earth is around 10N/kg. Astronauts on the moon attempt an experiment suggested by Galileo. They dropped a feather and a hammer at the same time, and they landed to runher.Newton also tried this experiment, dropping a coin and a feather first in air, then in a vacuum. In the air the coin landed first, but in a vacuum, they landed at the same time. The feather and the coin have a similar surface area, so when they begin to fall they should have about the same amount of drag. As they fall the air resistance on the feather in brief increases to balance its weight, causing it to travel at terminal velocity. The coin, on the other hand, is heavier, so it continues to accelerate, and probably hits the ground before reaching ter minal velocity.The drag force (air resistance) is always in the opposite direction to the motion. The force of gravity is equal and opposite to the drag force. I predict that by altering the surface area of the wings on my helicopter, I will be able to change the rate of descent by increasing and decreasing the air resistance of the wings. I think that if I increase the surface area of the wings, the amount of air resistance will increase, and my helicopter will take longer to reach the floor. If I decrease the surface area, there will be less air resistance, so my helicopter will travel faster.I also think that whilst doing my experiment, I may find the terminal velocity of one of my helicopters. Method Make a helicopter out of a piece of paper. Make the wings 11cm x 3cm each, and the base 10cm x 3cm, leaving a 1. 5cm gap from the edges of the wings, like the one faten here. Fold one wing forwards, and the other backwards along the dotted line. Measure a height of 2m from the f loor. Make a mark on the wall so that you know where to drop your helicopters from. Stand so that the first helicopter is train with the mark on the wall, and get another person to stand on the floor with a haul clock. Let go of the helicopter and time how long it takes to hit the floor. Record your results in a table. echo with the same sized helicopter 3 times, and then cut 1cm off the length of the wings. Repeat the experiment until the wings are 1cm long. To keep my experiment fair- I will use the same helicopter passim my experiment to ensure accurate results. I will also mark a point on the wall so that I can drop my helicopters from the same height every time. Results Analysis My results dont show a linear pattern, the average times go down in steps, but this may have been caused by experimental errors.More of my average times are above my line of best receive than on or below it. Evaluation I think that my experiment was fairly successful, as from my results I can see that my prediction is usually correct- reducing the surface area of the wings decreases the time it takes to get to the floor, because of the reduce in air resistance. If I was to do this experiment again, I would make another helicopter in a different way, because I think that that my results may have been in a more linear fashion if the helicopter spun more in the air.