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Briefing Doc: 🐸 Projectile Frog Game JavaScript HTML5 Applet Simulation Model

Source: Open Educational Resources / Open Source Physics @ Singapore

URL: https://sg.iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/245-projectile-frog-game

Main Themes:

• Educational Gaming: The source describes an interactive JavaScript HTML5 applet called the "Projectile Frog Game" designed to teach students the principles of projectile motion in an engaging way.
• Physics Concepts: The game focuses on concepts such as gravity force, trajectory, initial velocity, and angle of projection.
• Simulation and Customization: The applet provides a realistic simulation of projectile motion with customizable features like difficulty levels and varying initial conditions.
• User Experience: The game boasts a user-friendly interface with sliders and input fields for easy control, while also incorporating features like remembering user choices to enhance convenience.

Most Important Ideas/Facts:

• Objective: The player launches a frog, aiming to land it on a series of lily pads to reach a dragonfly.
• Gameplay: The player can adjust the frog's trajectory by manipulating the angle and force (initial velocity) of the launch.
• Difficulty Levels (Stages):Stage 0: Fixed lily pad positions, frog at (0,0), dragonfly at (10,0)
• Stage 1: Random x-positions for the 3rd and 4th lily pads, frog at (0,0), dragonfly at (10,0)
• Stage 2: Random x-positions for the 3rd and 4th lily pads, frog at (10,0), dragonfly at (0,0)
• Stage 3: Random dragonfly position, frog at (0,0)
• Stage 4: Random dragonfly position, frog at (0,2)
• Enhancements:The frog always remains within the screen view using Math.min(xmin,x) to prevent it from going off-screen.
• The combo box remembers the user's choice of stage, improving user experience.

Quotes:

• "The Projectile Frog Game is an interactive JavaScript HTML5 applet simulation model that allows users to explore the principles of projectile motion in a fun and engaging way."
• "The game is easy to learn and use and requires no prior knowledge of physics."
• "The game can be customized to suit the needs of different users using the different stages."
• "By using this formula, the simulation ensures that the frog remains visible on the screen at all times, even if it is launched at a very 90 to 180 degree angle or with a lot of speed."
• "The combo box is designed to remember the user's choice by using a feature called JavaScript undefined storage."

Target Audience:

This game is suitable for a wide range of learners, from elementary school students to those at the Pre-university level. It can be used for introducing basic physics concepts, reinforcing learned material, or assessing student understanding of projectile motion.

Projectile Frog Game Study Guide

Quiz

Instructions: Answer the following questions in 2-3 sentences each.

1. What is the primary objective of the Projectile Frog Game?
2. How does the Projectile Frog Game incorporate the concept of gravity?
3. What role does the initial velocity play in launching the frog?
4. How does adjusting the angle of projection impact the frog's trajectory?
5. Describe the significance of Math.min(xmin,x) in ensuring the frog remains visible.
6. What are the benefits of using a combo box for stage selection in the game?
7. How does the combo box contribute to user experience?
8. Explain how the game utilizes JavaScript undefined storage for combo box functionality.
9. Describe two ways the Projectile Frog Game can be customized to meet specific learning needs.
10. What are some educational settings where the Projectile Frog Game could be effectively utilized?

Answer Key

1. The main objective of the Projectile Frog Game is to launch a frog, by controlling its initial velocity and angle of projection, and land it safely on a series of numbered lily pads to eventually reach the lily pad with a dragonfly.
2. The game simulates the force of gravity by causing the frog to follow a parabolic trajectory, meaning it will descend back down after being launched.
3. Initial velocity determines the distance the frog can travel. A higher initial velocity will send the frog farther, while a lower initial velocity will result in a shorter jump.
4. The angle of projection determines the shape of the frog's trajectory. A steeper angle will result in a higher, shorter arc, while a shallower angle will lead to a longer, lower trajectory.
5. Math.min(xmin,x) ensures the frog remains within the screen's horizontal boundaries. It compares the frog's x-coordinate with the minimum x-coordinate of the screen and returns the smaller value, preventing the frog from moving off-screen.
6. A combo box offers a dropdown menu for selecting different stages, streamlining the process of choosing difficulty levels and scenarios. It also provides a clear and organized way to present the available options.
7. The combo box improves user experience by providing a user-friendly interface for stage selection, remembering the user's last choice, and reducing the need for repetitive actions.
8. The game uses JavaScript undefined storage by assigning a variable to the user's selected stage. This variable retains its value even after the game is reset, allowing the combo box to automatically display the user's previous selection.
9. The game can be customized by adjusting the difficulty level through different stages, each with unique lily pad arrangements and frog and dragonfly starting positions. Additionally, teachers can tailor the game's use by creating specific challenges and objectives based on the desired learning outcomes.
10. The Projectile Frog Game can be effectively utilized in various educational settings, including elementary schools, middle schools, and high schools, to introduce, reinforce, or assess students' understanding of projectile motion concepts. It can also be used in informal learning environments like science museums or after-school programs.

Essay Questions

1. Analyze the effectiveness of game-based learning, using the Projectile Frog Game as an example. How does its approach contribute to student engagement and comprehension of physics concepts?
2. Discuss the role of interactivity in the Projectile Frog Game. How does the ability to manipulate variables like initial velocity and angle of projection enhance the learning experience?
3. Evaluate the importance of visual feedback in the Projectile Frog Game. How does the visualization of the frog's trajectory and its interaction with the environment contribute to understanding projectile motion?
4. Explain how the Projectile Frog Game can be used as an assessment tool. What specific aspects of the game provide insights into students' understanding of projectile motion, and how can these insights inform instruction?
5. Compare and contrast the Projectile Frog Game with other teaching methods for projectile motion, such as textbook explanations, lectures, or physical experiments. What are the advantages and limitations of each approach, and in what contexts might each be most effective?

Glossary

Angle of Projection: The angle at which an object is launched with respect to the horizontal.

Combo Box: A graphical user interface element that allows users to select an option from a dropdown list.

Gravity: The force that attracts objects towards the center of the Earth.

Initial Velocity: The speed and direction of an object at the moment it is launched.

JavaScript Undefined Storage: A technique where a variable retains its assigned value even after the script or page is refreshed.

Lily Pads: In the game, these are the targets the frog must land on.

Math.min(xmin,x): A JavaScript function that returns the smaller value between the minimum x-coordinate of the screen (xmin) and the x-coordinate of the frog (x).

Projectile Motion: The motion of an object launched into the air and subject only to the force of gravity.

Trajectory: The path an object follows as it moves through space.

The Projectile Frog Game is an interactive JavaScript HTML5 applet simulation model that allows users to explore the principles of projectile motion in a fun and engaging way. This game is designed to teach players the basic concepts of physics, such as gravity force, trajectory initial velocity and angle of projection. The objective of the game is to launch a frog (vary magnitude of velocity and angle of projection) and help it land safely on a series of numbered lily pads to eventually land on the lily pad with a dragonfly. In this blog post, we will explore the different features of this game and how it can be used to teach physics to students.

The Projectile Frog Game is a simple yet powerful applet that uses HTML5 and JavaScript to create a realistic simulation of projectile motion. The game consists of jumping frog, and a series of lily pads that the frog must land on. The player can control the angle and force of the cannon to adjust the trajectory of the frog. The frog must land on the lily pads to continue its journey.

One of the best features of the Projectile Frog Game is its simplicity. The game is easy to learn and use and requires no prior knowledge of physics. The intuitive slider and input fields controls make it easy to adjust the trajectory of the frog and experiment with different angles and initial velocities. This makes it an ideal and fun tool for teaching students the basic concepts of projectile motion.

Another great feature of the Projectile Frog Game is its flexibility. The game can be customized to suit the needs of different users using the different stages.

• stage 0: frog is (0,0) and dragonfly is (10,0) with constantly positioned lily pads x = 0,2,4,6,8,10 etc and the y = 0
• stage 1: frog is (0,0) and dragonfly is (10,0) with 3rd and 4th lily pad x position is randomly positioned and the y = 0
• stage 2: frog is (10,0) and dragonfly is (0,0) with 3rd and 4th lily pad x position is randomly positioned and the y = 0
• stage 3: frog is (0,0) and dragonfly is random 
• stage 4: frog is (0,2) and dragonfly is random 

Teachers can let students play with the different difficulty levels.

The Projectile Frog Game can be used in a variety of educational settings, from elementary schools to Pre-universities. It can be used to introduce students to the basic principles of physics of projectile motion, or to reinforce concepts that they have already learned. The game can also be used as a tool for assessment, allowing teachers to test their students' understanding of projectile motion.

Overall, the Projectile Frog Game is a fun and engaging way to teach physics to students. Its simplicity, flexibility, and interactivity make it an ideal tool for educators who want to create an engaging learning experience for their students. Whether you are a teacher or a student, the Projectile Frog Game is a game that you won't want to miss.

Check it out here

https://sg.iwant2study.org/ospsg/index.php/interactive-resources/physics/02-newtonian-mechanics/01-kinematics/245-projectile-frog-game

20230302 Enhancement 1 Frog is always in screen view

In the Projectile Frog Game, it is possible for the frog to be launched outside of the screen. To handle this scenario, the simulation uses a formula called Math.min(xmin,x). This formula helps to adjust the position of the frog so that it stays within the bounds of the screen which is xmin,xmax,ymin and ymax.

The Math.min(xmin,x) formula is used in JavaScript to return the smaller of two values. In this case, the values are the x-coordinate of the frog and the minimum x-coordinate of the screen. The minimum x-coordinate of the screen is represented by xmin. If the x-coordinate of the frog is less than xmin, then the formula returns xmin. If the x-coordinate of the frog is greater than xmin, then the formula returns the x-coordinate of the frog.

By using this formula, the simulation ensures that the frog remains visible on the screen at all times, even if it is launched at a very 90 to 180 degree angle or with a lot of speed. This is important because it allows the player to track the trajectory of the frog and adjust their aim accordingly.

Another benefit of using this formula is that it helps to prevent errors in the simulation. If the frog were allowed to travel outside of the screen, it could potentially cause the simulation to crash or behave unpredictably. By keeping the frog within the bounds of the screen, the simulation remains stable and consistent.

20230302 Enhancement 2 remember user choice of combo box

The user can choose different stages to play on using a combo box. The combo box is designed in such a way that it remembers the choice made by the user, so that they do not have to re-choose the stage again. This feature enhances the user experience by making it more convenient and efficient.

 

The combo box is a drop-down menu that allows the user to select one of several options (stage 0 to stage 4). In the Projectile Frog Game, the options are different stages that the user can play on. When the user selects a stage, the game loads the corresponding level and displays it on the screen.

 

The combo box is designed to remember the user's choice by using a feature called JavaScript undefined storage. If the variable is defined, continue to use it after the reset button is clicked. When the user selects a stage from the combo box, the game remembers the choice. The next click on Reset button, the game remembers the choice and automatically selects the corresponding stage in the combo box.

 

By remembering the user's choice, the combo box saves the user time and effort. Instead of having to re-select the stage every time they play the game, the user can simply reset the game and start playing on their preferred stage. This makes the game more user-friendly and encourages repeat play.

 

In conclusion, the combo box in the Projectile Frog Game is designed to remember the user's choice of stage. This feature enhances the user experience by making it more convenient and efficient. By saving the user time and effort, the combo box encourages repeat play and makes the game more enjoyable overall.

 

 

Other resources

 

https://physics-zone.com/game/projectile-game/ by Farid