However, work was done to set the mass in motion. I mean, by definition, work is equal to this force times this distance that I'm applying the block-- that I'm pushing the block. To lift a certain object upward, the work must be done against the downward pull of the earth.
To lift a certain object upward, the work must be done against the downward pull of the earth. I do negative work shown in the histogram and the spring does positive work.
In our everyday language, work is related to expenditure of muscular effort, but this is not the case in the language of physics. This page gives a background to some of the clips shown in the multimedia tutorial. You have this force times distance expression right here. I have a block of mass m and it starts at rest.
Conclusion In this experiment I learn that the greater the displacement the greater the work done with a constant force acting on the system. The trolley is supporting six bags, so the force it applies upwards has magnitude 1.
So what is the acceleration? Which is frankly, as good of a definition as I could find. And in table 2, we measure the length of the string and the initial height which is the distance of the mass in the table which serve as our reference line.