SPH4U Lesson Assignment #11

SPH4U Lesson Assignment 11 In this assignment you are going to focus on: Collisions Total Marks: 35 marks Instructions: After completing the lesson action section of your home page, you are ready to complete your lesson assignment. Follow these steps. a) In the textbox given, explain the strategy that you used to determine your answer. b) Fill in your answer. The mark for each question is given at the introduction to the questions to be completed. c) When finished answering all your questions, save your file and upload the file into the appropriate dropbox. Part A ( Working with Collisions): Multiple Choice: ( 2 marks): Each question is worth different marks according to the strategy used. If calculations are required, the mark for the strategy will worth more marks and the final answer will be worth one mark. Identify the choice that best completes the statement or answers the question. Your choices are given below the text box. Make sure you include your strategy. ____ 1. (two marks) A moving curling stone, A, collides head on with a stationary stone, B. Both stones are of identical mass. If friction is negligible during this linear elastic collision, a. b. c. d. e. O stone A will slow down after the collision, the momentum of stone B will be less than that of stone A both stones will come to rest shortly after the collision after the collision, the kinetic energy of the stone B will be less than that of stone A after the collision, stone A will have a speed of zero SPH4U1 Lesson Assignment Page 1 Part B (Putting the Concepts to Work): Completion (31 marks): Using your reading, answer the following questions. Give your answer as well as your strategy for determining your answer. As part of your answer, give the page number in the reference material or the website that you used to find the answer to the question. 1. (five marks) A spring with a force constant of 89 N/m is compressed 8.7 cm and placed between two stationary dynamics carts of mass 1.0 kg and 1.5 kg. If friction is negligible, determine the final speed of the more massive cart when the spring is released. I it inti t d i 0.42 mb 2. (eight marks) A 34-g bullet travelling at 120 m/s embeds itself in a wooden block on a smooth surface. The block then slides toward a spring and collides with it. The block compresses the spring (k = 99 N/m) a maximum of 1.2 cm. Calculate the mass of the block of wood. Mp 34970.034kg itI II Mez 67.65 0.034 116849 mnua.aeggwnco.orm a v.FI SPH4U1 Lesson Assignment MMM Page 2 3. (eight marks) A 0.40-kg cue ball makes a glancing blow to a stationary 0.30-kg billiard ball so that the cue ball deflects with a speed of 1.2 m/s at an angle of 30.0º from its original path. Calculate the original speed of the cue ball if the billiard ball ends up travelling at 1.5 m/s. Va 199 m s 4. (eight marks) During a game of billiards, the 0.30-kg cue ball, travelling at 2.1 m/s, glances off a stationary 0.28-kg billiard ball so that the billiard ball moves off at 1.4 m/s at an angle of 38º from the cue ball’s original path. Find the new speed of the cue ball. Vef 1 33 SPH4U1 Lesson Assignment 8 mg Page 3 5. (eight marks) Mass, elasticity, momentum, and energy are very important concepts to consider in the design of a vehicle. Provide support for four different ways designers might consider these concepts in their design. 1. Mass: Lighter mass improves fuel e ciency and performance but must be balanced with safety requirements for crash protection. 2. Momentum: Understanding momentum is crucial for braking e ectiveness and designing crumple zones to manage impact forces during collisions. 3. Elasticity: Elasticity is vital for suspension components (springs) to absorb shocks and for tire design to ensure grip and a smooth ride. 4. Energy: Kinetic energy absorption is paramount in crashworthiness, with crumple zones designed to deform and dissipate energy away from occupants during an impact. SPH4U1 Lesson Assignment Page 4