Question

Name: Section: Date: Worksheet - Exp 4: Projectile Motion Part 1 Objective: The objective of this lab is to investigate projectile motion, first when a projectile is fired horizontally, and then when a projectile is fired from a non-zero angle of elevation. PROCEDURE Part 1: Horizontal Launch ($\theta_0 = 0^\circ$) 1. Open the Projectile Motion simulation in your browser and select the "Lab" option. Ensure gravity is set to 9.80 m/s² and the "air resistance" box is unmarked. 2. Set the initial height of the object as 5m by clicking and dragging the crosshairs at the back of the cannon. 3. Set the launch angle to $0^\circ$ by clicking and dragging the front of the cannon. 4. Choose the origin of your coordinate system. You will need to decide whether the origin is at the launch position or at the ground, and which direction is positive and which is negative. Record your decision below: (5 points) 5. Set the initial launch velocity to 10 m/s by clicking the arrows or dragging the slider under "Initial Speed". 6. Predict the time of flight and landing position using the kinematic equations and record them in the table on the next page ($x(m)_{\text{calc}}$ and $t(s)_{\text{calc}}$), show your work here. (15 points) 7. Fire the cannon by clicking the red fire button. Drag the investigation device from the the top right of the screen and measure the time of flight and landing position of the projectile by placing the crosshairs at the landing position. Record these values in the table. 8. Compare your calculated and experimental values for time of flight and landing position and record the percent error in the table. 9. Repeat steps 1 through 8 for initial velocities of 15 m/s and 20 m/s.

Name:
Section:
Date:
Worksheet - Exp 4: Projectile Motion Part 1
Objective: The objective of this lab is to investigate projectile motion, first when a projectile is fired horizontally,
and then when a projectile is fired from a non-zero angle of elevation.
PROCEDURE
Part 1: Horizontal Launch ($\theta_0 = 0^\circ$)
1. Open the Projectile Motion simulation in your browser and select the "Lab" option. Ensure gravity is set to 9.80
m/s² and the "air resistance" box is unmarked.
2. Set the initial height of the object as 5m by clicking and dragging the crosshairs at the back of the cannon.
3. Set the launch angle to $0^\circ$ by clicking and dragging the front of the cannon.
4. Choose the origin of your coordinate system. You will need to decide whether the origin is at the launch position
or at the ground, and which direction is positive and which is negative. Record your decision below: (5 points)
5. Set the initial launch velocity to 10 m/s by clicking the arrows or dragging the slider under "Initial Speed".
6. Predict the time of flight and landing position using the kinematic equations and record them in the table on the
next page ($x(m)_{\text{calc}}$ and $t(s)_{\text{calc}}$), show your work here. (15 points)
7. Fire the cannon by clicking the red fire button. Drag the investigation device from the the top right of the screen
and measure the time of flight and landing position of the projectile by placing the crosshairs at the landing
position. Record these values in the table.
8. Compare your calculated and experimental values for time of flight and landing position and record the percent
error in the table.
9. Repeat steps 1 through 8 for initial velocities of 15 m/s and 20 m/s.

Added by Mary B.

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