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the peak of the ajectory Learning Goal: To practice Problem-Solving Strategy 4.1 for projectile motion problems. A rock thrown with speed 12.0 m/s and launch angle 30.0° (above the horizontal) travels a horizontal distance of d = 16.5 m before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s² for the free-fall acceleration. Submit Correct Previous Answers It's best to place the origin of the coordinate system at ground level below the launching point because in this way all the points of interest (the launching point and the landing point) will have positive coordinates. (Based on your experience, you know that it's generally easier to work with positive coordinates.) Keep in mind, however, that this is an arbitrary choice. The correct solution of the problem will not depend on the location of the origin of your coordinate system. Now, define symbols representing initial and final position, velocity, and time. Your target variable is yi, the initial y coordinate of the rock. Your pictorial representation should be complete now, and similar to the picture below: Solve Part C xj Vix Viy a Xf Yf t Vfx Ufy Known Find x=0m t=0s x₁ = d Ꮎ yr=0m Yi Find the height y; from which the rock was launched. Express your answer in meters to three significant figures. ▸ View Available Hint(s) ΜΕ ΑΣΦ ? Yi = Review Submit x

the peak of the ajectory Learning Goal: To practice Problem-Solving Strategy 4.1 for projectile motion problems. A rock thrown with speed 12.0 m/s and launch angle 30.0° (above the horizontal) travels a horizontal distance of d = 16.5 m before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s² for the free-fall acceleration. Submit Correct Previous Answers It's best to place the origin of the coordinate system at ground level below the launching point because in this way all the points of interest (the launching point and the landing point) will have positive coordinates. (Based on your experience, you know that it's generally easier to work with positive coordinates.) Keep in mind, however, that this is an arbitrary choice. The correct solution of the problem will not depend on the location of the origin of your coordinate system. Now, define symbols representing initial and final position, velocity, and time. Your target variable is yi, the initial y coordinate of the rock. Your pictorial representation should be complete now, and similar to the picture below: Solve Part C xj Vix Viy a Xf Yf t Vfx Ufy Known Find x=0m t=0s x₁ = d Ꮎ yr=0m Yi Find the height y; from which the rock was launched. Express your answer in meters to three significant figures. ▸ View Available Hint(s) ΜΕ ΑΣΦ ? Yi = Review Submit x

University Physics Volume 1
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter4: Motion In Two And Three Dimensions
Section: Chapter Questions
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the peak of the ajectory Learning Goal: To practice Problem-Solving Strategy 4.1 for projectile motion problems. A rock thrown with speed 12.0 m/s and launch angle 30.0° (above the horizontal) travels a horizontal distance of d = 16.5 m before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s² for the free-fall acceleration. Submit Correct Previous Answers It's best to place the origin of the coordinate system at ground level below the launching point because in this way all the points of interest (the launching point and the landing point) will have positive coordinates. (Based on your experience, you know that it's generally easier to work with positive coordinates.) Keep in mind, however, that this is an arbitrary choice. The correct solution of the problem will not depend on the location of the origin of your coordinate system. Now, define symbols representing initial and final position, velocity, and time. Your target variable is yi, the initial y coordinate of the rock. Your pictorial representation should be complete now, and similar to the picture below: Solve Part C xj Vix Viy a Xf Yf t Vfx Ufy Known Find x=0m t=0s x₁ = d Ꮎ yr=0m Yi Find the height y; from which the rock was launched. Express your answer in meters to three significant figures. ▸ View Available Hint(s) ΜΕ ΑΣΦ ? Yi = Review Submit x
Transcribed Image Text:the peak of the ajectory Learning Goal: To practice Problem-Solving Strategy 4.1 for projectile motion problems. A rock thrown with speed 12.0 m/s and launch angle 30.0° (above the horizontal) travels a horizontal distance of d = 16.5 m before hitting the ground. From what height was the rock thrown? Use the value g = 9.800 m/s² for the free-fall acceleration. Submit Correct Previous Answers It's best to place the origin of the coordinate system at ground level below the launching point because in this way all the points of interest (the launching point and the landing point) will have positive coordinates. (Based on your experience, you know that it's generally easier to work with positive coordinates.) Keep in mind, however, that this is an arbitrary choice. The correct solution of the problem will not depend on the location of the origin of your coordinate system. Now, define symbols representing initial and final position, velocity, and time. Your target variable is yi, the initial y coordinate of the rock. Your pictorial representation should be complete now, and similar to the picture below: Solve Part C xj Vix Viy a Xf Yf t Vfx Ufy Known Find x=0m t=0s x₁ = d Ꮎ yr=0m Yi Find the height y; from which the rock was launched. Express your answer in meters to three significant figures. ▸ View Available Hint(s) ΜΕ ΑΣΦ ? Yi = Review Submit x
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