Part A An automobile engine slows down from 4000 rpm to 1400 rpm in 2.0 s. Calculate its angular acceleration, assumed constant. Express your answer using two significant figures. a= -140 rad/s? Submit Previous Answers v Correct Correct answer is shown. Your answer -136.13 rad/s was either rounded differently or used a different number of significant figures than required for this part. Part B Calculate the total number of revolutions the engine makes in this time. Express your answer as an integer. N = 86.6 revolutions

Part A An automobile engine slows down from 4000 rpm to 1400 rpm in 2.0 s. Calculate its angular acceleration, assumed constant. Express your answer using two significant figures. a= -140 rad/s? Submit Previous Answers v Correct Correct answer is shown. Your answer -136.13 rad/s was either rounded differently or used a different number of significant figures than required for this part. Part B Calculate the total number of revolutions the engine makes in this time. Express your answer as an integer. N = 86.6 revolutions

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter6: Uniform Circular Motion And Gravitation

Section: Chapter Questions

Problem 16PE: Olympic ice skaters are able to spin at about 5 rev/s. (a) What is their angular velocity in radians...

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Concept explainers

Angular speed, acceleration and displacement

Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.

Angular Position

Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.

Question

Part A
An automobile engine slows down from 4000 rpm to 1400 rpm
in 2.0 s .
Calculate its angular acceleration, assumed constant.
Express your answer using two significant figures.
a = -140 rad/s?
Submit
Previous Answers
Correct
Correct answer is shown. Your answer –136.13 rad/s was either rounded differently or used a different number of significant figures than required
for this part.
Part B
Calculate the total number of revolutions the engine makes in this time.
Express your answer as an integer.
?
N = 86.6
revolutions
Submit
Previous Answers Request Answer
X Incorrect; Try Again; 3 attempts remaining
Review your calculations and make sure you round to an integer in the last step.

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