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2. A dog is pulling a sled up a hill. If the rope used to pull the sled is subtended by an angle of 13° and the dog is pulling with a force of 555 N, how work is done if its pulled 30 m? 3. How long would it take a 3.2-kW motor to raise a 175-kg piano to an apartment 30 m off the ground?

2. A dog is pulling a sled up a hill. If the rope used to pull the sled is subtended by an angle of 13° and the dog is pulling with a force of 555 N, how work is done if its pulled 30 m? 3. How long would it take a 3.2-kW motor to raise a 175-kg piano to an apartment 30 m off the ground?

College Physics
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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Key Concepts: . Work: W F. |F||s|cos0 • Power: P %3D . Mechanical Energy (Kinetic and Potential) Reinforcement: 1. A construction site worker is tasked with transporting 55 blocks to the other side of the site. If the Truck bed is 1.7 m off the ground, how much work is done to lift all the blocks to the truck bed? I 2. A dog is pulling a sled up a hill. If the rope used to pull the sled is subtended by an angle of 13 and the dog is pulling with a force of 555 N, how work is done if its pulled 30 m? 3. How long would it take a 3.2-kW motor to raise a 175-kg piano to an apartment 30 m off the ground? 4. You are tasked with designing a new motor that is based off of an older model. The new model completes 1.5 times as much work in half the time. What would the new models power be rated as?
Transcribed Image Text:Key Concepts: . Work: W F. |F||s|cos0 • Power: P %3D . Mechanical Energy (Kinetic and Potential) Reinforcement: 1. A construction site worker is tasked with transporting 55 blocks to the other side of the site. If the Truck bed is 1.7 m off the ground, how much work is done to lift all the blocks to the truck bed? I 2. A dog is pulling a sled up a hill. If the rope used to pull the sled is subtended by an angle of 13 and the dog is pulling with a force of 555 N, how work is done if its pulled 30 m? 3. How long would it take a 3.2-kW motor to raise a 175-kg piano to an apartment 30 m off the ground? 4. You are tasked with designing a new motor that is based off of an older model. The new model completes 1.5 times as much work in half the time. What would the new models power be rated as?
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