Determine whether the height from which I drop a paper cake case affects how long it takes the paper cake case to fall to the ground.
The Paper Cake Case Investigation Aim To determine whether the height from which I drop a paper cake case affects how long it takes the paper cake case to fall to the ground. Prediction By doubling the height from which I drop the paper cake case it will double the time it takes the paper cake case to fall to the ground. The science behind the prediction If I drop the paper cake case from 80cm it will take a certain amount of time to fall to the ground, the time it takes is affected by the size, weight and air resistance of the paper cake case. I predict that if I then drop the same paper cake case from 160cm the time it would take to fall to the ground over 80cm will be doubled. I predict this because neither the size, the weight or the air resistance of the paper cake case has changed only the height from which I dropped it. If it took the paper cake case 1 second to fall 80cm it would be falling at a speed of: 80/1 = 80cm per second. If my prediction is right this means that a paper cake case falling from 160cm will also fall at a speed of 80cm per second consequently meaning that it would take it 2 seconds to reach the ground. I cannot be sure whether it would take twice as long for it to fall double the height until I have carried out the experiment. Also my prediction could be wrong as when a force acts upon an object the object keeps accelerating until another
Investigate the factors that affect the time period of swing of a simple pendulum.
Investigate The Factors That Affect The Time Period Of Swing Of A Simple Pendulum Aim: To investigate factors affecting the swing of a simple pendulum. Theory When the pendulum is at the top of the swing it has zero kinetic energy and full Potential energy. As the pendulum falls, the potential energy is transferred into kinetic energy. As the pendulum falls, the energy is released and reaches its maximum at the bottom of the swing. At this point, the potential energy is at its lowest and the kinetic energy is at its highest. As the pendulum swings upwards, the kinetic energy is transferred back into potential energy and the speed of the pendulum decreases. It falls to zero as it reaches the top of its swing and the potential energy is at a maximum. The Variables These are the variables that I could change for my investigation. Length Of String Mass Of Bob Angle Of Swing Preliminary Results I carried out these experiments so find out which of the variables had the greatest effect on the swing of the pendulum. Swing Length (m) Angle Of Swing (?) Mass Of Bob (g) Time-10 Swings (secs ) 0.182 20 0 0.3 0.182 30 0 8.82 0.182 40 0 8.95 0.28 20 0 0.72 0.087 20 0 5.94 0.152 20 0 7.75 0.152 20 20 8.10 0.152 20 30 7.79 From these results I have decided to change the string length because it is the factor which has the greatest effect on
I am going to investigate the different factors that affect the velocity of a trolley going down a ramp.
GCSE PHSICS COURSEWORK- TROLLEY INVESTIGATION TASK I am going to investigate the different factors that affect the velocity of a trolley going down a ramp. THEORY What is velocity? Velocity is how far an object has travelled, compared to how long it takes. How is it measured? I will be putting ticker tape on to the trolley. When the trolley has gone down the ramp I will count the last 10 dots and dividing that by the time which is 0.2 sec and that will equal the velocity. VELOCITY(M/S) = DISPLACEMENT(M)/TIME(SEC) VARIABLES I will have only one variable element which will be the height of the ramp as this is what we are investigating. The components which we will keep consistent throughout are:- Mass of the Trolley -As the force which will be acting on the ramp must stay the same throughout, and the mass is what will determine this. To control this quandary we will use the same trolley each time. Friction will slow down the speed at which the trolley travels. A way of reducing the amount of friction is by having a smoother surface and using the same ramp each time. Air resistance -we cannot control this to a great extent however we will keep the aerodynamics of the trolley the same each time. The length of the ramp must remain the same otherwise we will not be able to know whether the acceleration was influenced by the height of the ramp or
I was delegated to investigate the physics aspects and principles involved with a theme park ride.
Physics investigation Introduction: As part of a physics investigation, I was delegated to investigate the physics aspects and principles involved with a theme park ride. In the past it was usually roller coasters which were thoroughly examined, but I have chosen a ride that is a little far from the conventional; the 'Tidal wave', which is a giant log (wooden carriage) hurtling down from a high point down to a steep slope and in to water. Upon investigating the roller coasters, the main aim was to identify two aspects of physics involved and to further discuss these principles/aspects in order to find the effect, its purpose and how it influences the ride itself and people on board it. Identification of physics involved: There are many aspects of physics involved in the ride but I am only set to discuss two. However, it would be relevant to mention how the other aspects of physics involved and how they affect each other. The first aspect of physics which I noticed on the tidal was the acceleration and deceleration involved needed to bring the ride to a rest position. I also have chosen to discuss the force involved to 'push' the carriage down the steep slope. Explanation of principle and its uses to the 'Tidal wave': The acceleration is a measure of the rate at which the velocity of a particle is changing. On the 'Tidal wave', there is an acceleration as the carriage
Determination of the acceleration due to gravity using a simple pendulum.
AS Physics Coursework HANNAN SHAH Determination of the acceleration due to gravity using a simple pendulum Method Front view Side view First a long piece of string (approximately 1.5m long) was tied to a bob. A metre rule was used to measure a length of 1.2m from the centre of mass of the bob to the string. The remaining length of string was placed between the wooden blocks and clamped to the retort stand, as shown above. The wooden blocks were used to define the right angles to help when measuring the displacement and also to measure the string again to ensure it is still the same as the original measured length. Once the equipment was set up the bob was given a displacement of approximately 10 degrees and let go. The displacement has to be of this magnitude or else the error when calculating 'g' using (T = 2?Vl/g) will be greater. The stopwatch was started once the bob passed the fiducial marker (this is used to indicate the beginning of an oscillation). The timing was stopped once twenty oscillations were complete. Twenty oscillations were used to try and minimise the error that arises through the reaction times in stopping and starting the stopwatch. The time was recorded with the length in a table and the steps were repeated two more times to get two more readings. Once I had three readings I removed the string from the wooden blocks to measure a
Scientific Investigation: Catapults
Scientific Investigation: Catapults Variables: * Weight of projectile * Shape of projectile * Surface of the runway * The distance in which the band gets stretched The variable I will change is the weight of the projectile I think the weight of the projectile will effect the distance traveled, I think that if the weight of the projectile is reduced then it will be able to travel further down the runway than if it had any weights in. I think that the projectile will move further when the weight is decreased because there will be less friction and weights' slowing it down as it is projected down the runway. VARISABLE. HOW IT IS GOING TO BE CHANGED OR KEPT THE SAME THROUGH OUT THE EXPERIMENT. Weight of the projectile I am going to change this variable through out the experiment. I going to do this by adding a 10g weight on to the projectile after every experiment I will repeat this process until the projectile has a 100g weight inside. Shape of the projectile I will not be changing this variable. I will make sure of this by using the same projectile through out the experiment. Surface of the runway I will not be changing this variable. I will make sure of this by using the same runway through out the experiment. I will write my name on the runway to make sure I use the same one. The distance in which the band gets stretched I will not be changing this
A trolley is pushed to the top of a ramp, the summit being 20cm from the ground, and then is released.
A trolley is pushed to the top of a ramp, the summit being 20cm from the ground, and then is released. It rolls all the way down the ramp, of 2 metres, before it collides with the wall at the bottom. A couple of keen scientists thought it would be interesting to record the time taken for the trolley to reach the bottom and then calculate its average speed. They let the trolley fall down the ramp two more times after that, just to make their results more accurate. They also wanted to investigate if the height of the summit made any difference to the average speed, so they raised the ramp to 30cm and pushed the trolley down the ramp again and recorded the time. Basically I have been asked to act as the two enthusiastic experts and test, as a primary objective, to see if the height of the summit affects the average speed at which the trolley travels down the ramp. Based on my existing scientific knowledge, I know that this experiment depends on a certain type of energy being converted into another type. When the trolley is raised to the top of the ramp, it gains a certain amount of potential energy - this is converted into kinetic (movement) energy as the trolley moves down the slope. Too see what factors may affect the way the experiment turns out, it may be useful to look at the formula for potential energy. P.E = mhg (where m=mass, h=height and
Liquid Friction.
Nick Earnshaw Bedford School Candidate 3440 AS Coursework - Making Sense of Data "Liquid Friction" Apparatus Not in diagram: * Stopwatch * Top pan balance (accurate to nearest 0.1g) * Micrometer screw gauge * Several different size ball bearings. * Small magnet * Long ruler Method The apparatus was setup as on the previous page, a ruler was used to mark the depths of 0.2m and 0.7m. The glycerol was left to settle. The mass of each steel ball bearing was measured using a top pan balance and the diameter was measured using a micrometer screw gauge. The results from this were recorded and each measuring device was reset to zero each time. Each steel ball bearing was coated in glycerol and then released from just below the surface of the glycerol, using tweezers. The time taken for each steel ball bearing to drop from a depth of 0.2m and 0.7m was timed using a stopwatch and then recorded. This step was repeated a further two times for each steel ball bearing. The steel ball bearings were retrieved after each attempt, using a small magnet. Results I have formatted a table with the data attained from the experiment described above, each row of data relates to a different steel ball bearing. The density of glycerol used was 1262 kg/m3. mass diameter time to fall 0.5m (g) (mm) (s) 2 3 Average low* .58 70.4 70.8 70.5 70.6 0.13 3.18 8.2 8.1
Policing has made huge progress since 1900. Do you agree?
History Essay Question: Policing has made huge progress since 1900. Do you agree? Since the 1900's the police did gain a substantial amount of respect from the public but whether or not they made a huge progress is debatable. In this essay I will discuss the way the police have changed and progressed. I will also discuss the upside and downside that the police went through during the 1900's. At the beginning of the 20th century, there were over 20 police forces situated around the country. These were often very small and carried out their own procedures. The fact is, the number of police members entering the force grew form 3200 men to 100,000 men. This obviously shows us that the police force had something to offer the public; as a result the police force grew bigger in size and progressed. Despite this fact the local forces often failed to co-operate with each other. This meant that it was difficult to co-ordinate action against criminals who were becoming increasingly mobile. Due to this fact, the police force was deterred from progressing further. When this glitch in the policing system was finally established as holding the police back and allowing criminal activities to grow, many police forces in the country were forced to amalgamate in order to reduce the growing crime rate. This change was achieved by the Police Act of 1964. This amalgamation was
Pendulums Experiment
Pendulums Experiment Aim To investigate the motion of pendulums, and using their rate of fall, calculate the value of acceleration due to gravity (G) Hypothesis The force of gravity acts on all objects around earth. It is a constant force that pulls objects toward it at a constantly accelerating speed (not considering resistance). This acceleration is known as G or gravitational pull. When an object is lifted away from the earth, it gains gravitational potential energy (GPE); this is only released when the object is allowed to travel back to the earth when it is released as kinetic energy as it falls. This is rather like a toy push-car being pulled backwards then let go. When a pendulum is lifted, it is given GPE; this is then released as kinetic energy when it is let go. However instead of stopping when the pendulum reaches the bottom of its arc, it continues to move. This is because the piece of string stops it from moving any further towards Earth; therefore it has gravitational energy left over which it can convert to kinetic energy. It then continues to rise in the opposite direction, until it reaches the point where it has the same GPE as at the beginning i.e.) the same height. It then begins to fall once more. Diagram Apparatus Pendulum and length of string, Clamp-stand and boss, Stop-watch, Metre Rule Method The apparatus was set up as in the diagram and the
