Investigating into the factors that affect acceleration Essay Example for Free

Investigating into the factors that restore speedup undertakeI have chosen to investigate the affect changing the amount of force applied to an objective has on acceleration. Hypothesis I predict that as the amount of force applied to the cable tramway increases, the acceleration exit increase in direct proportion. I believe this will happen because according to Newtons minute Law, increasing the force increases the acceleration, provided the big money stays the same. Therefore, acceleration is directly proportional to the force applied. Fair see Without fair testing the essay would be useless because the information gathered would not be holy or reliable. Here are the things we did to ensure our experiment was a fair test The distance travelled the mass and weight of the trolley sh both remain constant, as these are not the factors we will be changing. The solitary(prenominal) thing we will change will be the force applied to the trolley. No force will be applied to t he trolley when it is at the top of the racecourse, instead we will just permit go of it and let gravity be the force. When putting the trolley at the top of the runway we will experience sure that the stern wheels of the trolley are touching the middle timer this way all(prenominal) experiment will start in the same place.We will test the trolley forraderhand to ensure all wheels were working, because if one or more wheels are not working this could affect the speed/acceleration of the trolley. safety Precautions As with all experiment, safety is crucial. Ein truth experiment possesses some form of danger and through these guidelines I apply the risk of danger will be minimised Make sure the trolley is stopped beforehand it reaches the terminus of the runway where the pulley is to stop damage to trolley, runway or pulley.Make sure that when contractable the trolley at the opposite end of the runway you are not in front of it before it reaches a halt as it could cause an injury Ticker Timer For this experiment we shall use a heart-timer to record our results. A ticker-timer is a way of analysing the motion of objects. As the trolley moves, it drags the tape through the ticker timer, thus leaving a trail of percentage points, which were printed there by a vibrating metal bar run on an electric current, which hits a valet de chambre of paper fifty times a second.The analysis of a ticker tape will reveal if the object is moving with constant velocity or accelerating. This is how we hope to record the acceleration of our trolley. To get the results from the ticker timer tape, you need to divide the tape into five dot strips, this is because each five dots is equal to 0. 1 seconds. Preliminary Work Before the actual experiment took place, we immovable to do some preliminary work. There was a chance that something could go wrong, for example, the trolley could hit the nerve of the runway, or the weights could fall off or the ticker timer would no t be entirely unblemished.So we gave the experiment a test run to make sure everything worked according to plan. The test run went swimmingly and so we all agreed the experiment would be a success Prediction Graph Equipment raceway Trolley Metre Stick Ticker Timer Roll of ticker timer tape pulley-block String Weights Diagram Method First of all we collected all of the equipment. Then we lay the runway on a raised surface approx. a metre above the floor. Once this had been done, we prepared the ticker timer at the top of the runway.We did this by cutting ticker timer tape to 85 cm (We chose this length because the tape will be out of the ticker timer before the weights hit the floor). Next, we plugged the wires into the ticker timer in their rightful places and wander the ticker-timer tape through the ticker timer. Then we placed the trolley at the top of the runway. We then stuck the ticker timer tape to the back of the trolley with tape. Next, we threaded a piece of string th rough the trolley and attached it to the pulley at the opposite end of the runway.To the end of this string we added different weights according to which experiment we were on. We started with 100g that is equal to 1 Newton in force. Then, on the count of three we simultaneously turned on switched on the mains, which activated the ticker timer and let go of the trolley, which caused it to roll down the runway. It rolled down the runway because the force of gravity acting on the weights pulled it. Once the ticker timer tape was out of the ticker timer we stopped the trolley to prevent it from hitting the pulley at the bottom end. We then switched off the ticker timer.We then labelled the piece of ticker timer tape to refer to when writing down our results. We then repeated this process for 200g, 300g, 400g, 500g, 600g, 700g, 800g, 900g and 1000g. Results exponent = 1N Acceleration = (final speed start speed).Unfortunately, my graph has not turned out how I expected. The results sh ow me that in my experiment the acceleration was not directly proportional to the force applied, which (in relation to my scientific research) should not be possible. The graph should be a straight diagonal line (as seen in my predicted graph) however mine was very varied, although it did follow a positive correlation, so we were on the right lines. Evaluation My results were not very accurate at all. I feel this is because there were a lot of factors that made it an unfair test disdain my efforts to keep it fair.This could also be the reason why there are various anomalous results (it index be possible that all the results are anomalous ) The factors that would have altered my results include * Friction. The surface of the act caused friction because any type of grip on the surface could black the trolley down. Also, the surface of the wheels could slow down the trolley because this is the affect of any type of traction provided by wheels. There is little we behind do to crea te a friction-less workspace, but to keep it a fair test, we will keep the factors change friction constant. Air-resistance.As the trolley moves through the air the trolley pushes on the air and the air pushes back on the trolley making it speed up less (this is called action and reaction). Again, there is not overmuch we can do about this, but if we were to do this experiment again we would keep the aerodynamics of the trolley constant. * Slight curve in runway. This makes a slightly bigger force act on the trolley as it goes downhill therefore it has a greater speed. Next time, we could ensure that the runway is completely monotonous to prevent unfair alterations to results. The ticker timer would alter the result as well.Consider the fact that in every second the tape gets hit fifty times this must have had some affect on the results. Unfortunately I dont think we could change this were we to do the experiment again because with the equipment available to us there is nothin g more accurate. Given more time, I would have liked to repeat each experiment up to five times, to ensure the results were fair -and to prevent the amount of anomalous results. Also, if I were to do it again, I feel that we could extend the experiment. Originally the aim was to find out the factors which affected acceleration.During this experiment we only if altered the force and nothing else, it would be worthwhile to alter opposite things such as the mass of the trolley, the distance, the weight etc. It would be interesting to see if we could prove Newtons Second Law through other experiments using different trolleys. (His law states that acceleration is directly proportional to the force applied). For example, we have proved (to the ruff of our ability) that through using the trolley that we did Newtons Second Law does not work, but would it work for other trolleys?