In the absence of air resistance, a projectile is launched from and returns to ground level. It follows a trajectory similar to that shown in Figure 3.10 and has a range of 15 m. Suppose the launch speed is doubled, and the projectile is fired at the same angle above the ground. What is the new range?

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In the absence of air resistance, a projectile is launched from and returns to ground level. It follows a trajectory similar to that shown in Figure 3.10 and has a range of 15 m. Suppose the launch speed is doubled, and the projectile is fired at the same angle above the ground. What is the new range?

### Projectile Motion

**Illustration of Projectile Motion**

The diagram provided offers a comprehensive explanation of the trajectory in projectile motion. Here's a breakdown of the key elements illustrated:

1. **Initial Velocity \((v_0)\):**
   - The trajectory begins with an initial velocity \(v_0\), which is directed at an angle \(\theta\) from the horizontal axis.
   - This initial velocity can be decomposed into two components:
     - \(v_{0x}\): The horizontal component of the initial velocity.
     - \(v_{0y}\): The vertical component of the initial velocity.

2. **Velocity Components:**
   - The position and velocity of the projectile at any point in its path can be examined by separating the motion into horizontal and vertical components.
     - The horizontal axis is labeled as \( +x \).
     - The vertical axis is labeled as \( +y \).

3. **Trajectory Path:**
   - The dashed line represents the parabolic path the projectile follows.
   - Gravity acts on the projectile, causing its vertical velocity component to change throughout its flight.

4. **Maximum Height (\(H\)):**
   - The maximum height \(H\) is the highest vertical position reached by the projectile.
   - It occurs when the vertical component of the velocity (\(v_y\)) becomes zero.

5. **Range (\(R\)):**
   - The range \(R\) is the horizontal distance traveled by the projectile from its launch point until it returns to the same vertical level (assumed to be the launch height).

6. **Axis Orientation:**
   - The smaller inset graph reaffirms the orientation of the coordinate axes:
     - \(+y\) direction is upwards.
     - \(+x\) direction is rightwards.

This illustration is crucial for understanding the principles of kinematics, specifically how initial velocity and gravity interact to influence the path of a projectile. By analyzing the components of motion separately, one can predict and calculate various parameters such as maximum height, time of flight, and range.
Transcribed Image Text:### Projectile Motion **Illustration of Projectile Motion** The diagram provided offers a comprehensive explanation of the trajectory in projectile motion. Here's a breakdown of the key elements illustrated: 1. **Initial Velocity \((v_0)\):** - The trajectory begins with an initial velocity \(v_0\), which is directed at an angle \(\theta\) from the horizontal axis. - This initial velocity can be decomposed into two components: - \(v_{0x}\): The horizontal component of the initial velocity. - \(v_{0y}\): The vertical component of the initial velocity. 2. **Velocity Components:** - The position and velocity of the projectile at any point in its path can be examined by separating the motion into horizontal and vertical components. - The horizontal axis is labeled as \( +x \). - The vertical axis is labeled as \( +y \). 3. **Trajectory Path:** - The dashed line represents the parabolic path the projectile follows. - Gravity acts on the projectile, causing its vertical velocity component to change throughout its flight. 4. **Maximum Height (\(H\)):** - The maximum height \(H\) is the highest vertical position reached by the projectile. - It occurs when the vertical component of the velocity (\(v_y\)) becomes zero. 5. **Range (\(R\)):** - The range \(R\) is the horizontal distance traveled by the projectile from its launch point until it returns to the same vertical level (assumed to be the launch height). 6. **Axis Orientation:** - The smaller inset graph reaffirms the orientation of the coordinate axes: - \(+y\) direction is upwards. - \(+x\) direction is rightwards. This illustration is crucial for understanding the principles of kinematics, specifically how initial velocity and gravity interact to influence the path of a projectile. By analyzing the components of motion separately, one can predict and calculate various parameters such as maximum height, time of flight, and range.
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