Homework Help is Here – Start Your Trial Now!
Science
Physics
KE (J) 그아 6 4 2 + t(s) 250 50 100 150 200

KE (J) 그아 6 4 2 + t(s) 250 50 100 150 200

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)...
See similar textbooks
icon
Related questions
Question

what is the power at 30 seconds, 75 seconds and 145 seconds?

KE (J) 10- 8 6. 4 2 t (s) 250 50 100 150 200
Transcribed Image Text:KE (J) 10- 8 6. 4 2 t (s) 250 50 100 150 200
Expert Solution
Step 1

Power is defined as work done per unit time i.e.

P = W∆t

by the work-energy theorem change in kinetic energy equals work done

so the slope of the curve of Kinetic energy versus time gives the power of the system at the moment so the power of the system at time 30 seconds, 75 seconds and 145 seconds will be given by the slope at these moments:

At 30 sec

the curve is a straight line with slope:

Power = Slope = ∆KE∆t

Power= 4J - 0J50            = 0.08 J/s

Positive power represents that the kinetic energy of the system is increasing with time

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
College Physics
College Physics
Physics
ISBN:
9781305952300
Author:
Raymond A. Serway, Chris Vuille
Publisher:
Cengage Learning
University Physics (14th Edition)
University Physics (14th Edition)
Physics
ISBN:
9780133969290
Author:
Hugh D. Young, Roger A. Freedman
Publisher:
PEARSON
Introduction To Quantum Mechanics
Introduction To Quantum Mechanics
Physics
ISBN:
9781107189638
Author:
Griffiths, David J., Schroeter, Darrell F.
Publisher:
Cambridge University Press
Physics for Scientists and Engineers
Physics for Scientists and Engineers
Physics
ISBN:
9781337553278
Author:
Raymond A. Serway, John W. Jewett
Publisher:
Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:
9780321820464
Author:
Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:
Addison-Wesley
College Physics: A Strategic Approach (4th Editio…
College Physics: A Strategic Approach (4th Editio…
Physics
ISBN:
9780134609034
Author:
Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:
PEARSON
SEE MORE TEXTBOOKS