55. A police officer is driving due north at a constant speed of 29 m/s relative to the ground when she notices a truck on an east-west highway ahead of her, driving west at high speed. She finds that the truck's speed relative to her car is 48 m/s (about 110 mph). (a) Sketch the vector trian- gle that shows how the truck's velocity relative to the ground is related to the police car's velocity relative to the ground and to the truck's velocity relative to the police car. The sketch need not be to scale, but the veloc- ity vectors should be oriented correctly and bear the appropriate labels. (b) What is the truck's speed, relative to the ground?

55. A police officer is driving due north at a constant speed of 29 m/s relative to the ground when she notices a truck on an east-west highway ahead of her, driving west at high speed. She finds that the truck's speed relative to her car is 48 m/s (about 110 mph). (a) Sketch the vector trian- gle that shows how the truck's velocity relative to the ground is related to the police car's velocity relative to the ground and to the truck's velocity relative to the police car. The sketch need not be to scale, but the veloc- ity vectors should be oriented correctly and bear the appropriate labels. (b) What is the truck's speed, relative to the ground?

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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