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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Question
![**Problem Statement:**
A drill is moving at 6 rad/s when it speeds up at 2 rad/s² for 3 seconds. Find the angular velocity at the end of the problem.
**Options:**
- A) 12 rad/s
- B) 40 rad/s
- C) 4 rad/s
- D) 1 rad/s
**Explanation:**
To solve the problem, we can use the formula for angular velocity under constant angular acceleration:
\[ \omega_f = \omega_i + \alpha \times t \]
Where:
- \( \omega_f \) = final angular velocity,
- \( \omega_i \) = initial angular velocity = 6 rad/s,
- \( \alpha \) = angular acceleration = 2 rad/s²,
- \( t \) = time = 3 s.
Calculating the final angular velocity:
\[ \omega_f = 6 \, \text{rad/s} + (2 \, \text{rad/s}^2 \times 3 \, \text{s}) = 6 \, \text{rad/s} + 6 \, \text{rad/s} = 12 \, \text{rad/s} \]
Thus, the correct answer is A) 12 rad/s.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F00114bb1-0365-4dfa-83cb-10b10c9a61b0%2F33c9a076-8127-4dbf-abe0-a2a9eb8259be%2F0kq34v_processed.png&w=3840&q=75)
Transcribed Image Text:**Problem Statement:**
A drill is moving at 6 rad/s when it speeds up at 2 rad/s² for 3 seconds. Find the angular velocity at the end of the problem.
**Options:**
- A) 12 rad/s
- B) 40 rad/s
- C) 4 rad/s
- D) 1 rad/s
**Explanation:**
To solve the problem, we can use the formula for angular velocity under constant angular acceleration:
\[ \omega_f = \omega_i + \alpha \times t \]
Where:
- \( \omega_f \) = final angular velocity,
- \( \omega_i \) = initial angular velocity = 6 rad/s,
- \( \alpha \) = angular acceleration = 2 rad/s²,
- \( t \) = time = 3 s.
Calculating the final angular velocity:
\[ \omega_f = 6 \, \text{rad/s} + (2 \, \text{rad/s}^2 \times 3 \, \text{s}) = 6 \, \text{rad/s} + 6 \, \text{rad/s} = 12 \, \text{rad/s} \]
Thus, the correct answer is A) 12 rad/s.
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