---
title: "Three identical rocks are launched with identical speeds from the top of a platform of height \\( h_0 \\).  Rock 1 is launched at a \\( 45^\\circ \\) angle above the horizontal Rock 2 is launched at a \\( 45^\\circ \\) angle below the horizontal Rock 3 is launched horizontally  Which of the following correctly relates the magnitude \\( v_y \\) of the vertical component of the velocity of each rock immediately before it hits the ground?"
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url: "https://nerd-notes.com/ubq/20444/"
date_modified: "2025-05-04T00:44:40+00:00"
---

# Three identical rocks are launched with identical speeds from the top of a platform of height \( h_0 \).  Rock 1 is launched at a \( 45^\circ \) angle above the horizontal Rock 2 is launched at a \( 45^\circ \) angle below the horizontal Rock 3 is launched horizontally  Which of the following correctly relates the magnitude \( v_y \) of the vertical component of the velocity of each rock immediately before it hits the ground?

Three identical rocks are launched with identical speeds from the top of a platform of height \( h_0 \).

- Rock 1 is launched at a \( 45^\circ \) angle above the horizontal
- Rock 2 is launched at a \( 45^\circ \) angle below the horizontal
- Rock 3 is launched horizontally

Which of the following correctly relates the magnitude \( v_y \) of the vertical component of the velocity of each rock immediately before it hits the ground?

- **A.** \[v_{y1} = v_{y2} = v_{y3}\]
- **B.** \[v_{y1} = v_{y2} > v_{y3}\]
- **C.** \[v_{y1} > v_{y3} > v_{y2}\]
- **D.** \[v_{y2} > v_{y3} > v_{y1}\]

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/20444/*