Use spring tension 1. </p > Drag bags of sand, plastic covers, moving slowly in regular speed belonged. Ngatham thayae horizontal angle between each note and record the size and direction of the force.
The one that springs to haul sandbags, plastic cover slowly moving horizontally with a speed consistent. The diagonal angle between the observed and the magnitude and direction of the force.
Using spring force 1. Drag sand bags plastic cover to move slowly in the horizontal speed. In the angle between Homer to observe and record the size and direction of the force.