What is a free-body force diagram? Force is a vector quantity Therefore, the effect of a force depends on its magnitude and direction We can draw forces as vectors ( ) to help us break down all the different forces that are acting on an object Free body diagram = A diagram of an object that shows the size and direction of all forces acting on it

What forces are acting on the CARRIAGE? Brainstorm all the forces acting on the car Tow truck -road -gravity

How do we develop a free-body force diagram?  Use these questions each time Is there gravity? Fg Is the object on a surface? FN (normal) Is the object being pulled or pushed? Fa (applied) Is there friction on a surface? Ff Is there air resistance? Fair Is the object hanging? Ft (tension) Which way are all of these forces pulling the object? Brainstorm all the forces acting on the car Tow truck -road -gravity

What forces are acting on the CARRIAGE? Brainstorm all the forces acting on the car Tow truck -road -gravity

How do we develop a free-body force diagram? Force of Ground (Normal Force) FN Force of the horse Force of Friction FF FA Brainstorm all the forces acting on the car Tow truck -road -gravity Force of Gravity Fg

Draw the free-body diagram of a soccer ball being kicked What are the forces on the soccer ball? Which way should the forces be drawn?

Draw the free-body diagram of a soccer ball being kicked What are the forces on the soccer ball? Which way should the forces be drawn? FN Force of Ground (Normal Force) Force of Kick FA FG Force of Gravity