Acceleration Force And Mass Essay Research Paper

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Acceleration, Force And Mass Essay, Research Paper Aim: ?I intend to investigate the rule of F = M*A and so investigate the relationships between acceleration, force and mass and how they affect each other.Preliminary Workings: The main aim of my project is to investigate three factors, and so I will start off with a few lines about each of them. The idea of a force is fundamental to physics and it is simply thought of as a push or a pull, but this is not satisfactory for my purposes. We cannot see a force but instead we can see its effect on an object (the principle of Brownian Motion), so forces are described in terms of what they do. Forces tend to cause changes in an objects 1. Shape or size 2. Speed in a straight line 3. Direction Forces are measured in newtons (N),

named after the person who first invented this unit. When several forces act on an object, they can either combine to give an overall force ? which will change the object?s shape or motion ? or they could cancel each other out, giving no overall force. In the last case it could be said that the forces are ?balanced?. If there is no force acting, or if all the forces acting on an object are balanced, then there will be no change taking place. An object at rest will remain at rest, and a moving object will continue to move, keeping the same speed and travelling in the same direction. ??????????? The mass of an object tells us how much matter it contains and is measured in the unit of kilograms (kg). Whereas mass is a scalar quantity (magnitude only), forces are vector quantities,

meaning they have both direction and magnitude. ??????????? Acceleration is the rate at which the velocity of an object changes, over a period of time. It is measured in metres-per-second per second (m/s/s) or meters-per-second squared (m/s²), and it tells you how much the velocity will change each second. The acceleration of an object can be calculated by using the following formula:(average) acceleration (m/s²) =?? change in velocity (m/s)??????? or in symbols: a = v – u ??????????????????????????????????????????????? ? time taken for the change (s)?? ??????????????????????????????????? twhere u is the velocity at the beginning of the time interval and v is the velocity at the end of the time interval. When an object is slowing down the change in the velocity is negative

(because v is less than u), and so the acceleration is negative. This is sometime called deceleration. The acceleration at any point on a? journey can be calculated by measuring the slope of a velocity-time graph. In effect this is the same as applying the formula that I have included above. To show some of these graphs I have included some below to show how different accelerations can be portrayed for varying and constant changes.??????????????????????????????????? Velocity (m/s)?????????????????????????????????????????? Velocity (m/s) ??????????? ?????????????????????????????????????????????????? Time (s)???????????????????????????????????????????????????????? Time (s) ??????? Steady acceleration from rest??????????????????? Increasing acceleration from rest From these examples

it is possible to work out what other graphs of this type would look like and should stand me in good stead for this project.The next scientific that I will look at is that worked on by the famous scientist that I have already mentioned ? Sir Isaac Newton. During his work he discovered some laws of motion, which are quite appropriate to what I am investigating: Law 1: Any object will continue to do what it is already doing unless a resultant force is acting on it.?????? I am used to the idea that an object on the ground, which is given to start it, will come to rest quickly. Of course once it is moving, friction is a force that acts upon it to cause a change, in this case a reduction in velocity until the object stops. Without friction, as in space, an object given a push will