×
Get Full Access to Physics: Principles With Applications - 6 Edition - Chapter 7 - Problem 39pe
Get Full Access to Physics: Principles With Applications - 6 Edition - Chapter 7 - Problem 39pe

×

# (a) Find the useful power output of an elevator motor that

ISBN: 9780130606204 3

## Solution for problem 39PE Chapter 7

Physics: Principles with Applications | 6th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants

Physics: Principles with Applications | 6th Edition

4 5 1 298 Reviews
28
4
Problem 39PE

(a) Find the useful power output of an elevator motor that lifts a 2500-kg load a height of 35.0 m in 12.0 s, if it also increases the speed from rest to 4.00 m/s. Note that the total mass of the counterbalanced system is 10,000 kg—so that only 2500 kg is raised in height, but the full 10,000 kg is accelerated. (b) What does it cost, if electricity is \$0.0900 per kW ? h ?

Step-by-Step Solution:

Step-by-step solution Step 1 of 5 The equation to find the power is, Here is the power, is the work done and is the time period.

Step 2 of 5

Step 3 of 5

## Discover and learn what students are asking

Calculus: Early Transcendental Functions : Moments, Centers of Mass, and Centroids
?Center of Mass of a Two-Dimensional System In Exercises 9-12,find the center of mass of the given system of point masses.

Calculus: Early Transcendental Functions : The Cross Product of Two Vectors in Space
?In Exercises 1-6, find the cross product of the unit vectors and sketch your result. $$\mathbf{j} \times \mathbf{i}$$

Statistics: Informed Decisions Using Data : Tests for Independence and the Homogeneity of Proportions
?Credit Risk Traditional underwriting to determine the risks associated with lending include credit scores, income, and employment history. The online

Statistics: Informed Decisions Using Data : Inference on the Least-Squares Regression Model and Multiple Regression
?Rents in New York The data in Problem 3 represent the square footage and rent for apartments in the borough of Queens and Nassau County, New York.

#### Related chapters

Unlock Textbook Solution

Enter your email below to unlock your verified solution to:

(a) Find the useful power output of an elevator motor that