力学课后思虑题部份(国外英文资料).docVIP

力学课后思考题部份(国外英文资料) Chapter 1 What is the significance and difference of the following? (1) F1 = f2. (2) f2 = F1. (3) force F1 The force of force and the force of resistance 1-2? Those axioms or inferences apply only to rigid bodies A? The principle of the two forces balance???? The parallelogram rule of force B??? C and the reaction theorem What is the difference between the two forces, the balance of force and the principle of action and reaction? The two force balance is the force acting on the same object, the force and the reaction are on two different objects The force is different from the force Is it true that 1-4 determines the following statement? Why? Is the following statement correct? Why? A rigid body is an object that is deformed by external forces. (1) a rigid body is an object that deforms very small under the action of an external force; All the straight poles connected by hinges are two. (2) all the straight poles connected by hinges are two. If the three forces acting on the rigid body in coplanar and concurrent, (3) if the forces acting on a rigid body three coplanar and concurrent for a bit, the rigid body must balance; The rigid body must be balanced; If you have three forces on the rigid body, 1, refers to the rigid body under the action of external force, the size and shape of the same object, 2, only to see the plane hinge structure, is a fixed outer protection, in this there is a movable ball, ball is confined to Circle, ball attached to thin rod out of the bound so you dont know the point of contact with the ball, so it has the contact position of arbitrary, arbitrary stress direction so hinge have encountered the problem, is done with other force that hinge rod force 3 concurrent action line in the same plane in a bit of force system consisting of three force must be balanced Chapter 2 The projection of 2 to 1 is equal to the projection of F1 from F2 on the same axis, and ask whether these two forces must be equal to each other. When the