introduction!!! physics!!!

INTRODUCTION
The project entitled Tractor Pulling Mechanism which the Researchers modified from pulley, aims to create more torque which is converted from energy by using gears. Furthermore they aim to reduced the friction and heat by clamping the tractor to the skateboard and to maximize the power, the researchers made sure that they had a strong gear ratio as well as to reduce the friction and lastly they used sturdy fishing to lower the chance of the wire to slip.

The tractor clamps to the skateboard and winds up the fishing line from the base that is located at finish. The gears provide greater torque so that the tractor can pull more weight at the expense of speed.

Torque is the tendency of a force vector to rotate an object about some axis (or fulcrum). Just as a Force is a push or pull, a torque can be thought of as a twist. The symbol for torque is T, the Greek letter Tau. And the length of lever arm is particularly import; choosing this length appropriately lies behind the operation of pulleys, gears and most simple machines involving a mechanical advantage.

Energy comes from the Greek word”energeia,” which means active/working it is a scalar physical quantity that is an attribute of objects and systems that is conserved in nature. Energy is subject to a strict global conservation law; that is, whenever one measures the total energy of a system of particle whose interactions do not depend explicitly on time, it is found that the total energy of the systems always remains constant.

Power is the rate at which work is performed or energy is transmitted, or the amount of energy required of expended for a given unit of time. In mechanical power, the work done on an object is related to the forces acting on it by where F is force and
‘s is the displacement of the object. Lastly Work is equal to the force acting on an object times its displacement (how far the object moves while the force acts on it.) Only motion that is along the same axis as the force “counts”, however; motion in the same direction as force gives positive work; and motion in the opposite direction gives negative work, while motion perpendicular to the force yields zero work by differentiating by time gives that the instantaneous power is equal to force times the object’s velocity: the average power is then, this formula is important in characterizing engines – the power out by an engine is equal to the forces it exerts times its velocity.

Friction is the force resisting the relative lateral (tangential) motion of solid surface, fluid layer or material elements in contact. It is usually subdivided into several varieties dry friction which is subdivided into Static Friction and Kinetic Friction, Lubricated Friction resists relative lateral motion of two solids surface separated by a layer of gas on liquid.
The Researchers got the idea of making two in one projects by having the modification to the pulley to a mini tractor mechanism while the skateboard is modified to a mini tractor which has a set of weights to have the mass.