1. A 5.00 x 105-kg subway train is brought to a stop from a speed of 0.400 m/s in 0.300 m by a large spring bumper at the end of its track. Neglect friction. Think & Prepare 1. Make note of what's given and what's unknown. Relate known quantities to symbols. 2. Draw a labeled sketch if possible. 3. Identify the physics principle and approach. Write down relevant equations symbolically. Simplify if possible. 4. Insert numerical quantities to solve for unknowns. 5. Does the answer make sense? Physics Principles (a) What external forces act on the train? Are they conservative or non-conservative? Normal force: present and non-conse Spring force: present and conservativ Weight: present and conservativ (b) Is mechanical energy conserved during the stopping of the train? Think about reasons for your answer. yes (c) What is the force constant k of the spring? Enter to 3 significant figures k= 3.55 X 10 X N/m

1. A 5.00 x 105-kg subway train is brought to a stop from a speed of 0.400 m/s in 0.300 m by a large spring bumper at the end of its track. Neglect friction. Think & Prepare 1. Make note of what's given and what's unknown. Relate known quantities to symbols. 2. Draw a labeled sketch if possible. 3. Identify the physics principle and approach. Write down relevant equations symbolically. Simplify if possible. 4. Insert numerical quantities to solve for unknowns. 5. Does the answer make sense? Physics Principles (a) What external forces act on the train? Are they conservative or non-conservative? Normal force: present and non-conse Spring force: present and conservativ Weight: present and conservativ (b) Is mechanical energy conserved during the stopping of the train? Think about reasons for your answer. yes (c) What is the force constant k of the spring? Enter to 3 significant figures k= 3.55 X 10 X N/m

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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