Lola's car is stuck in the mud. Julie and Jamaal come along in a truck to help pull her out. They attach one end of a tow strap to the front of the car and the other end to the truck's trailer hitch, and the truck starts to pull. Meanwhile, Julie and Jamaal get behind the car and push. The truck generates a horizontal force of 387 lb on the car. Julie and Jamaal are pushing at a slight upward angle and generate a force of 122 lb on the car. These forces can be represented by vectors, as shown in the figure below. The angle between these vectors is 21.4°. Find the resultant force (the vector sum), then give its magnitude and its direction angle from the positive x-axis. 122 lb 21.4° 387 lb a. The resultant force is (Tip: omit degree notations from your answers; e.g. enter cos(45) instead of cos(45°)) b. it's magnitude is lb. c. It's angle from the positive x-axis is Hint: For a detailed solution, see the example (Finding Resultant Force) in Section 2.1 (Vectors in the Plane).

Lola's car is stuck in the mud. Julie and Jamaal come along in a truck to help pull her out. They attach one end of a tow strap to the front of the car and the other end to the truck's trailer hitch, and the truck starts to pull. Meanwhile, Julie and Jamaal get behind the car and push. The truck generates a horizontal force of 387 lb on the car. Julie and Jamaal are pushing at a slight upward angle and generate a force of 122 lb on the car. These forces can be represented by vectors, as shown in the figure below. The angle between these vectors is 21.4°. Find the resultant force (the vector sum), then give its magnitude and its direction angle from the positive x-axis. 122 lb 21.4° 387 lb a. The resultant force is (Tip: omit degree notations from your answers; e.g. enter cos(45) instead of cos(45°)) b. it's magnitude is lb. c. It's angle from the positive x-axis is Hint: For a detailed solution, see the example (Finding Resultant Force) in Section 2.1 (Vectors in the Plane).

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter7: Gravitation

Section: Chapter Questions

Problem 99A

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