You throw a 20-N rock vertically into the air from ground level. You observe that when it is a height 15.1 m above the ground, it is traveling at a speed of 24.7 m/s upward. Use the work-energy theorem to find its speed just as it let the 15] ΑΣΦ 2017.72 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining ? m/s

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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**Exercise 6.20**

*A physics problem involving the work-energy theorem.*

**Problem Description:**

You throw a 20-N rock vertically into the air from ground level. You observe that when it is at a height of 15.1 meters above the ground, it is traveling at a speed of 24.7 meters per second upward.

**Part A:**

- **Objective:** Use the work-energy theorem to find its speed just as it left the ground.
- **Attempted Answer:** \( v_0 = 17.72 \, \text{m/s} \)
- **Outcome:** Incorrect. Try again; 3 attempts remaining.

**Part B:**

- **Objective:** Use the work-energy theorem to find the maximum height.
- **Attempted Answer:** \( h = 15.4 \, \text{m} \)
- **Outcome:** Incorrect. Try again; 5 attempts remaining.

This exercise requires students to apply their understanding of the work-energy theorem to solve problems related to projectile motion. The tasks involve calculating the initial speed and the maximum height of the rock using given data.
Transcribed Image Text:**Exercise 6.20** *A physics problem involving the work-energy theorem.* **Problem Description:** You throw a 20-N rock vertically into the air from ground level. You observe that when it is at a height of 15.1 meters above the ground, it is traveling at a speed of 24.7 meters per second upward. **Part A:** - **Objective:** Use the work-energy theorem to find its speed just as it left the ground. - **Attempted Answer:** \( v_0 = 17.72 \, \text{m/s} \) - **Outcome:** Incorrect. Try again; 3 attempts remaining. **Part B:** - **Objective:** Use the work-energy theorem to find the maximum height. - **Attempted Answer:** \( h = 15.4 \, \text{m} \) - **Outcome:** Incorrect. Try again; 5 attempts remaining. This exercise requires students to apply their understanding of the work-energy theorem to solve problems related to projectile motion. The tasks involve calculating the initial speed and the maximum height of the rock using given data.
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