Force and free body diagrams. Physics 3) We think of each oval magnitude and opposite direction on the second object. These two forces together are called an action-reaction pait or Newton's 3rd law force pair. Identify all forces together are orce pairs on the free-body diagrams for the books. Mark them with an X on the diagrams for the first pair and XX for the second pair, etc.. For the following situations:? Draw a picture and identify the forces, then? Draw a complete free-body diagram for the object, following the steps given above.? Draw a vector on your free-body diagram indicating the approximate magnitude and direction of the net force on the object, F ner If the net force is zero, say so explicitly.a)A heavy crate is being lowered straight down at constant speed by a steel cable. b)A child is pushing a box across the floor at a steadily increasing speed. Let the box be"the system" for analysis.c)A bicycle is speeding up down a hill. Friction is negligible, but air resistance is not.

Force and Free Body Diagrams Name: A Free-body Diagram is a representation of all the forces acting on an object. A proper free body diagram should not have anything on it except a representation of the object and the labeled forces acting ON that object. Label your forces in such a way to make it clear (1) the type of force, (2) the object on which the force is exerted, and (3) the object exerting the force. 1. Sketch a free-body diagram for a book at rest on a level table. Book a. What evidence do you have for the existence of each of the forces on your diagram? b. What observations can you make that allow you to determine the relative magnitudes of the forces acting on the book? How can you show the relative magnitudes of the forces on your diagram? 2 A second book of greater mass is placed on top of the first. Sketch a free-body diagram for each of the books in the space Upper book below. Label all the forces appropriately. Specify which forces Lower book are contact and which are long-range. Examine all the forces in the two free-body diagrams you just drew. Explain why a force that appears on one diagram should NOT appear on the other diagram