hw04 - larger, smaller)? Explain your answer. 7 Hobson,...

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Phys 100 Fall 2011 Concepts of Physics: Homework 4 Due: 21 September 2011 In order to receive full credit, you must show all work, calculations and provide complete reasons and explanations for your solutions. 1 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Conceptual Exercise 2, page 91. 2 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Conceptual Exercise 8, page 91. 3 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Conceptual Exercise 12, page 91. 4 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Problem 4, page 92. 5 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Problem 8, page 93. 6 Forces Two people, Angela and Bryce, push heavily laden sleds across frozen ponds. The sleds are identical and have identical masses. The ponds provide frictionless surfaces and air resistance can be ignored. During a particular period lasting for 30 s , Angela pushes her sled from rest to a speed of 5 m/s while Bryce pushes his sled at a constant speed of 10 m/s . How does the force which Angela exerts on her sled compare to that which Bryce exerts on his sled (same,
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Unformatted text preview: larger, smaller)? Explain your answer. 7 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Conceptual Exercise 44, page 92. 8 Hobson, Physics: Concepts and Connections, 5ed Ch. 4 Problem 16, page 93. 9 Reading exercise: gravity Read section 5.1 (pages 95 97) of the text. a) Aristotelian physics would say that no forces are required to move the moon in a circular orbit since this is its natural motion. Does this agree with the notions of Galileo and Newton regarding the motion of objects? Explain your answer. b) What is the direction of the force exerted by Earth on the falling apple? What is it on the orbiting moon? c) Do Concept Check 1 before looking at the answer and check whether you were correct or not. Note that a 2 N apple means that the gravitational force exerted on the apple is 2 N . d) Do Concept Check 3 before looking at the answer and check whether you were correct or not. 1...
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