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A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s². Consider the system is the box and the Earth. Which of the following is considered the external force? Select all apply. 1=

A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s². Consider the system is the box and the Earth. Which of the following is considered the external force? Select all apply. 1=

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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### Problem Description: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use \( g = 10 \, \text{m/s}^2 \). Consider the system to be the box and the Earth. Which of the following is considered the external force? Select all that apply. ### Illustration: - The diagram depicts a box labeled with mass \( m \), suspended inside an elevator. - An upward arrow labeled \( \vec{v} \) represents the elevator moving upwards. ### Multiple Choice Options: - [ ] tension force on the box - [ ] gravitational force on the box ### Instructions: Select all the forces that are considered external to the box-Earth system.
Transcribed Image Text:### Problem Description: A box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use \( g = 10 \, \text{m/s}^2 \). Consider the system to be the box and the Earth. Which of the following is considered the external force? Select all that apply. ### Illustration: - The diagram depicts a box labeled with mass \( m \), suspended inside an elevator. - An upward arrow labeled \( \vec{v} \) represents the elevator moving upwards. ### Multiple Choice Options: - [ ] tension force on the box - [ ] gravitational force on the box ### Instructions: Select all the forces that are considered external to the box-Earth system.
**Problem Statement**: A compressed spring of \( k = 60 \, \text{N/m} \) is released from rest on a frictionless surface. What is the change in spring potential energy from its compressed position \( x = 0.40 \, \text{m} \) to its equilibrium position, in Joules? *Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.* [Answer box for student input]
Transcribed Image Text:**Problem Statement**: A compressed spring of \( k = 60 \, \text{N/m} \) is released from rest on a frictionless surface. What is the change in spring potential energy from its compressed position \( x = 0.40 \, \text{m} \) to its equilibrium position, in Joules? *Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.* [Answer box for student input]
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