Newtons Law of Motion - Assignment Example

 Newton’s Law of Motion The mass of a given object is conventionally defined as the inertia measure of an object. Inertia is defined as the ability of an object to remain in a resting position, and of a motion body to continue with its movement without changing its velocity. For many years, scientists found it important to think mass that the amount of matter is defined by its mass, but that notion has since seized to be tenable. The standard kilogram is defined as the mass of an object which is defined as 1 kilogram (Bradner & Susskind, 2006). The masses of various objects are determined by comparing with the mass. Where the gram mass is taken to be 0.001kg. Generally, force is the agency to make a change. Mechanically, a force is anything that changes an object’s velocity. Force is characterized as a vector quantity this is because it has both direction and magnitude. An external force on the other hand is a force whose source is off the considered system. The Net External Force that acts on the object causes the acceleration of the object in the force’ direction. The acceleration is directly proportional to force and indirectly proportional to mass. The SI unit of force is Newton. One Newton is defined as the resultant force that gives one kilogram mass an acceleration equivalent to 1m/s^2. A pound is equivalent to 4.45N. Newton’s First Law states that “An object at rest will remain at rest; an object in motion will continue in motion with constant velocity, except insofar as it is acted upon by an external force” (Bradner & Susskind, 2006). Force is defined as the changer of motion. Meaning that there is a conventional tendency of an object to maintain its current position. All objects tend to resist changes in their current motion state. When the unbalanced force is absent, the object in a moving motion will maintain its motion state. Conversely, Newton’s Second Law was framed based on the momentum concept. Therefore, it is the net force F, that acts on the object with a mass m is zero, the object will accelerated in the force direction. The acceleration is proportional to force and indirectly proportional to object mass. With force in Newton’s, mass in kilograms, and acceleration in m/s^2, the relationship between the three variables is written as Acceleration has similar direction to the resultant force. The equation vector is written based on the named components as When the forces applied on an object are the elements of the external force that acts on the object. It is common knowledge that heavy objects need more force to move similar distance as the lighter objects. However, the law provides us with an exact relationship between the acceleration, mass, and force, which is expresses as According to Newton’s third law, matter tends to interact with matter. Meaning that the forces come in two. Therefore, Newton’s third law states “For each force exerted on one body, there is an equal, but opposite directed, force on some other body interacting with it” (Bradner & Susskind, 2006). This is normally referred as the action and reaction force. Note that the reaction and action force act on to opposite object. Meaning for every force there is an opposite force that is similar in size but in an opposite direction. Therefore, whenever an object is pushed it is pushed back in the opposite direction. In universal gravitation, when two objects with mass m and m’ attract gravitationally, their attraction is based on forces with the same equal magnitude. For the point masses, the attracting forces is given by r is the distance between the centers of the mass. G is .m Fg is in newton’s, m and m’ in kg, while r is in meter. This is referred as Newton gravitation law and is always considered to be universal since it is applicable to objects that have a distinct mass. Although surpassed by gravitation theory of Einstein, the formula tends to work well in all the applications. The weight of a matter is defines as the gravitational force that acts downward for the object. On earth, the planet exerts the gravitation force on the object. Weight is measured in Newton’s and in pounds. Since the earth is not uniformly shaped and always in rotation, the weight is different from the one defined above. In acceleration from gravity, one distinguishes two different acceleration forms due to gravity. One that is symbolized by g entails the impact of the earth’s rotation and changes from 9.78 m/s2 to 9.83m/s2 at the pole (Bradner & Susskind, 2006). The average value of the surface of the earth is 9.81 m/s2. Conversely, the absolute acceleration occurs due to gravity alone. This acceleration excludes the planetary rotation and changes on earth at the pole from 9.81m/s2 to 9.83 m/s2. To simplify the measurement the acceleration is assumed to be standard (g=9.81 m/s2). Tensile force acting on a chain is the applied force that stretches it. The tensile force magnitude is referred as the tension. The friction forces is defined as the tangential force that acts on the object that opposed the object sliding on adjacent and contact surface. The force of friction is parallel to the contact and opposite to the motion direction or the impending motion. The object will start sliding when the applied forces surpass the maximum static friction. The normal force of a matter supported by an object surface is the elements of a supporting force perpendicular to object’s surface. The coefficient of the kinetic friction is defined based on the case where a single surface slides across another surface at constant and maintained speed. The formulae for kinetic friction coefficient is The coefficient of the Static Friction is defined on situations where a single surface is one the verge to slide across another object’s surface. The formulae for coefficient of the static friction is In the formulae, the maximum friction force happens when the object is one the verge of sliding (Bradner & Susskind, 2006). Reference Bradner, J. E., & Susskind, T. Y. (2006).Newton's law of motion. Anaheim, Calif.: Litton Instructional Materials, Inc. Read More