Answer Happy

Learning Goal To understand Newton's 3rd law, which states that a physical interaction always generates a pair of forces on the two interacting objects. In Principis, Newton wrote: To every action there is always opposed an equal reaction: or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts em 1 (translation by Cajor) The phrase after the colon (often omitted from textbooks) makes it clear that this is a statement about the nature of force. The central idea is that physical interactions (e.g., due to gravity, objects touching, or electric forces) cause forces to arise between pairs of objects. Each pairwise interaction produces a pair of opposite forces, one acting on each object. Whatever the physical cause of the interaction, the force acting i on object A due to object B is equal in magnitude and opposite in direction to the force acting on object B due to object A Incidentally, Newton states that the word "action" denotes both (a) the force due to an interaction and (b) the changes in momentum that it imparts to the two interacting objects. If you haven't learned about momentum, don't worry; for now this is just a statement about the origin of forces. Mark each of the following statements as true or false. If a statement refers to "two objects interacting via some force, you are not to assume that these two objects have the same mass. Part A Every force has one and only one 3rd law pair force ANSWER: Part B The two forces in each pair act in opposite directions. ANSWER: true false true false false true Part C The two forces in each pair can act on the same object or on different objects. ANSWER: Processing math: 100%
The two forces in each pair may have different physical orgins for instance, one of the forces could be due to gravity, and a pair force could be a normal contact force) ANSWER Item 2 true false Part E The two forces of a 3rd law pair always act on different objects ANSWER: frum false Part F Given that two objects interact via some force, the accelerations of these two objects have the same magnitude but opposite directions. (Assume no other forces act on either object) You did not open hints for this part. ANSWER: true false Part G According to Newton's 3rd law, the force on the (smaller) moon due to the (larger) earth is ANSWER: greater in magnitude than, and in the opposite direction from, the force on the earth due to the moon. greater in magnitude than, and in the same direction as, the force on the earth due to the moon. equal in magnitude to, and in the opposite direction from, the force on the earth due to the moon. equal in magnitude to, and in the same direction as, the force on the earth due to the moon. smaller in magnitude than, and in the opposite direction from, the force on the earth due to the moon. smaller in magnitude than, and in the same direction as, the force on the earth due to the moon. der is sliding down a 15° slope. Friction is not negligible. ocessing math: 100%
Part A Eric has a mass of 50 kg. He is standing on a scale in an elevator that is accelerating downward at 1.7 m/s². What is the approximate reading on the scale? Processing math: 100%
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(Intel) ENTRUN BEVER Capola Shift Ctrl Item 6 Item 7 FR A Z From 3.0 = S kinele ction force state friction force normal force gravitational force X AR с V Part B What is the force that to holding the boun the force that is pose the weight force ANSWER Part A How much force does the 4.0 kg block exert on the 5.0 kg block? Express your answer with the appropriate units. ANSWER Part B How much force does the 4.0 kg block exert on the 3.0 kg block? Express your answer with the appropriate units. ANSWER G B H N M Y V. Alt J Blocks with masses of 3.0 kg. 4.0 kg, and 5.0 kg are lined up in a row on a frictionless table. All three are pushed forward by a 16 N force applied to the 3.0 kg block A. Ctrl Home Learning Goal: To practice Tactics Box 5.2 Working with objects in contact. A 1200-kg car pushes a 2100-kg truck that has a dead battery to the right. When the driver steps on the accelerator, the drive wheels of the car pur