By Abdulhadi A Haider A Hilal B Yasser

By Abdulhadi A. , Haider A. , Hilal B. , Yasser Y.

What is Work? Work is the amount of energy exhausted to perform a certain task inside or outside a system. Ex: 12000 J of work is exhausted by a engine in order to push a car 4000 N.

Formulas

Formulas Displacement is a vector quantity of distance measured from position one to position two. Since displacement is a vector quantity work is also a vector quantity. Force in calculation is a scalar quantity that can only be represented as a positive number. In examples where the angle of work is 0 the formula is: W=F*d

Units Work= Joules are the SI unit of work. A joule is equivalent to a newton times a meter. A joule is also equivalent to to (kg*m^2)/s^2 due to the composition of a newton. Displacement is measured as a unit of distance SI unit being meters. Force is measured as a unit of force SI unit being N. Ex: A displacement of 200 m along with 40 N of force creates 8000 J of work.

Relationships Work and force are directly related. Work and displacement are directly related. Ex: As work goes up force goes up. As work goes up displacement goes up. As work goes down force goes down.

Situations where work is zero When the angle of work is 90 degrees. When no force is applied (F=0). When there is no displacement. When force is perpendicular to displacement. When force cancels out displacement.

Example: A car is pushed 4000 N on a displacement on -23 m. What is work? F=4000 N D=-23 m W=? W=F*D =(4000 N)(-23 m)=-92000 J