An engineer is trying to determine the height from which she needs to release a 69kg wrecking ball such that the wrecking ball will be traveling 12.4m/s when it strikes the building at the position shown. Neglect drag. List the energy types at the initial and final time and whether work and loss (due to non-conservative forces) occur as well as the corresponding amounts of energy.

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Chapter1: Units, Trigonometry. And Vectors
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### Energy Calculations on Physics Website

An engineer is trying to determine the height from which she needs to release a 50 kg wrecking ball so that the ball will be traveling at 12.4 m/s when it strikes the building at the position shown. Neglect drag.

1. **Energy Types at Initial and Final Time:**
   - **Initial:**
     - GPE (Gravitational Potential Energy)
     - Work: No work
     - Loss: No loss
   - **Final:**
     - GPE & KE (Kinetic Energy)

2. **Question:**
   - From what height above the ground does the engineer need to release the ball?
   - **Height (\( h \)):** [blank] m

3. **Diagram Description:**
   - On the right side of the screen, there is an illustration of a crane labeled "BARNHART" with a wrecking ball attached, poised to strike a building.
   - The reference level is shown, and the desired travel path of the ball is indicated with a dotted line heading towards the building.
   - The diagram also includes a reference height of 4 meters.

4. **Interactive Elements:**
   - Text boxes are provided for entering values related to energy calculations.
   - Options to check answers and receive hints are available.

5. **Additional Instructions:**
   - Keep numbers in 3 significant figures.
   - Utilize a designated calculator if required.

This setup allows students to engage actively with the problem, understanding energy transformations from potential to kinetic energy in a physics context.
Transcribed Image Text:### Energy Calculations on Physics Website An engineer is trying to determine the height from which she needs to release a 50 kg wrecking ball so that the ball will be traveling at 12.4 m/s when it strikes the building at the position shown. Neglect drag. 1. **Energy Types at Initial and Final Time:** - **Initial:** - GPE (Gravitational Potential Energy) - Work: No work - Loss: No loss - **Final:** - GPE & KE (Kinetic Energy) 2. **Question:** - From what height above the ground does the engineer need to release the ball? - **Height (\( h \)):** [blank] m 3. **Diagram Description:** - On the right side of the screen, there is an illustration of a crane labeled "BARNHART" with a wrecking ball attached, poised to strike a building. - The reference level is shown, and the desired travel path of the ball is indicated with a dotted line heading towards the building. - The diagram also includes a reference height of 4 meters. 4. **Interactive Elements:** - Text boxes are provided for entering values related to energy calculations. - Options to check answers and receive hints are available. 5. **Additional Instructions:** - Keep numbers in 3 significant figures. - Utilize a designated calculator if required. This setup allows students to engage actively with the problem, understanding energy transformations from potential to kinetic energy in a physics context.
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