scalar quantity is equal to the product of the diplacement
work
three things that are necessary to happen at work
pushing a wall
no work is done
pushing a book across the table
work is done
force and displacement are perpendicular
no work is done
90°
no work is done
0°
work is done
force displaces the object in its direction the work is done
positive work
direction force and the displacement are perpendicular
zero work
fore and the displacement are in opposite direction
negative work