Force Diagram Frisbee. In the following example the disc is caught by a receiver and the stack has moved up the pitch closer to the end zone. It acts perpendicular to the direction of flight and drag.
A force has both magnitude and direction making it a vector quantity. The backward arrow d is the force of drag. It is generally customary in a free body diagram to represent the object by a box and to draw the force arrow from the center of the box outward in the direction that the force is acting.
The arrow v shows the direction of flight v stands for velocity.
The disc is turned through an angle of 30 in 20 ms. You gave the frisbee thrust with your arm. Force is pressure times area and one 40 mm diameter piston has the same area as four 20 mm diameter pistons. Applied and how the force is applied is just as important as how much force is applied when we want to make something rotate.