Assignment #4 Chapter 5 Questions: 5.2 Third law force pairs act on different systems. Only one member of each third law force pair ever is used in Newton’s second law. 5.3 Because of the rotation of the earth, the surface of the earth is only approximately an inertial reference frame. 5.5 The reading of the scale on the incline will be less than when the scale is on level ground. The scale measures the magnitude of the normal force of you on its surface. 5.10 There may be forces acting on the system, but the vector sum of the forces will be zero since the system is moving at constant velocity or is at rest. 5.18 No, the total force is parallel to the acceleration. 5.32 The magnitude of the force you exert on the earth is 600 N and the force is directed vertically upward at your location. Chapter 5
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