Two friends are trying to move a heavy desk. Sally is pulling on it with a rope at 30 degrees above the horizontal, while Bob is pushing on the other side at 20 degrees (slightly downward and forward). Sally pulls with a force of 150 N and Bob pushes with a force of 180 N. The desk is 25 kg and the coefficient of kinetic friction between the desk and floor is 0.80. Bob 200 Sally 30⁹0, a) What is the acceleration of the desk? b) If the desk starts at rest at t=0, how far has it moved 2 seconds later?
Two friends are trying to move a heavy desk. Sally is pulling on it with a rope at 30 degrees above the horizontal, while Bob is pushing on the other side at 20 degrees (slightly downward and forward). Sally pulls with a force of 150 N and Bob pushes with a force of 180 N. The desk is 25 kg and the coefficient of kinetic friction between the desk and floor is 0.80. Bob 200 Sally 30⁹0, a) What is the acceleration of the desk? b) If the desk starts at rest at t=0, how far has it moved 2 seconds later?
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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Transcribed Image Text:**Problem Statement:**
Two friends are trying to move a heavy desk. Sally is pulling on it with a rope at 30 degrees above the horizontal, while Bob is pushing on the other side at 20 degrees (slightly downward and forward). Sally pulls with a force of 150 N and Bob pushes with a force of 180 N. The desk is 25 kg and the coefficient of kinetic friction between the desk and floor is 0.80.
**Diagram Explanation:**
- The diagram shows a rectangular desk with two force vectors acting on it.
- Bob's force is represented by an arrow at a 20-degree angle below the horizontal, labeled "Bob."
- Sally's force is represented by another arrow at a 30-degree angle above the horizontal, labeled "Sally."
**Questions:**
a) What is the acceleration of the desk?
b) If the desk starts at rest at t=0, how far has it moved 2 seconds later?
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