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Centennial High School, Calgary - PHYSICS 30Assignment 1.

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Physics 30: Assignment 1 1 43 Marks Total ASSIGNMENT 1 Part One: Momentum and Newton’s Second Law Part One of this assignment is worth 22 marks. The value of each question is noted in parenth ... eses in the left margin. Note: The answer areas will expand to fit the length of your response. 1. Use reasoning to determine if one of the following objects in each of these pairs has a greater value for the magnitude of its momentum than the other. (No calculations should be required.) (1) a. a 900.0-kg truck travelling at 60 km/h, or a 500.0-kg car travelling at 60 km/h Answer: A 900.0-kg truck travelling at 60 km/h (1) b. a 15.0-kg object travelling to the right at 5.0 m/s, or a 15.0-kg object travelling to the left at 5.0 m/s (3) 2. The momentum of a 75-g dart is 9.00 kg∙m/s east. What is the velocity of the dart? As with all problems involving vectors, remember to include the direction in your answer. Answer: (9)/(0.075) =120m/s East 3. A 425-g softball is travelling at 18.6 m/s [214o]. (2) a. What is the momentum of the softball? (1) b. Which of the four vectors below accurately shows the direction of the softball using the polar coordinates method as described on page 78 of the Pearson text? Answer: (3) 4. What is the mass of a boat if it travels at a velocity of 57.0 km/h [E] and has a momentum of 2.15 x 106 kg∙m/s [E]? (4) 5. Use the concepts of momentum and Newton’s second law to explain why a motorcycle can accelerate at a greater rate than a large truck. [Show More]

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