Item 7 Item 6 Part A Two football players are pushing a 60 kg blocking sled across the field at a constant speed of 2.5 m/s. The coefficient of kinetic friction between the grass and the sled is 0.30. Once they stop pushing, how for will the sled slide before coming to reat? ANSWER: Fup Jason works for a moving company. A 95 kg wooden crate is sitting on the wooden ramp of his truck; the ramp is angled at 11°. 0.32 m 1.1 m 2.1 m Part A What is the magnitude of the force, directed parallel to the ramp, that he needs to exert on the crate to get it to start moving up the ramp? 2.5 m Express your answer with the appropriate units. ANSWER: Fdown = Part B What is the magnitude of the force, directed parallel to the ramp, that he needs to exert on the crate to get it to start moving down the ramp? core Summary: Express your answer with the appropriate units. ANSWER:
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 Principle. Newton wrobe 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 HW 16 Due: 11:59pm on Wednesday, June 15, 2022 To understand how points are awarded, read the bading Policy for this signment Item 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 on object A due to object 6 is equal in magnitude and opposite in direction to the force acting on object 8 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 truo false true Part C The two forces in each pair can act on the same object or on different objects. ANSWER false Processing math: 100%