Teach lesson
Projectiles 1/3: which angle goes farthest?
Compare 35°, 45°, and 55° in the Projectiles remote lab while keeping trajectory and launch level fixed.
Learning Outcomes
Use a controlled comparison by changing only the launch angle.
Record evidence from three real result images.
Decide which angle went farthest and justify the decision with table data.
Student activity preview
Activity Content
Preview only. In a class session, students can fill in responses and submit their work to the teacher.
Predict before opening the lab
7 min
When you throw a ball, aiming higher does not always mean going farther. A low launch moves strongly forward but lands sooner; a higher launch stays in the air longer but moves less forward each moment. This activity asks which trade-off works best in a real launch.
You will compare three launches in the same remote lab. To make the comparison fair, you will only change the angle: 35°, 45°, and 55°. The trajectory will always be complete, and the launch level will always be low.
Notice the launcher, impact area, and measuring tape: these are the references you will use when measuring.
The figure only organizes the comparison. The result must come from your observations.
Before measuring, which prediction seems most reasonable?
Explain your prediction in one or two sentences. You do not need to be right; you need to make clear what idea you are testing.
Run three comparable launches
17 min
Open the lab from TEACH and complete one row for each angle. In the lab UI, completa means complete trajectory and bajo means low level.
Open the Projectiles lab
Choose complete trajectory (
completa) and low level (bajo). Keep both fixed.Launch at 35°. Wait for the result image and read the approximate distance.
Repeat at 45° and 55°.
In each row, record the reading, comparison, and confidence note.
Angle comparison
Complete one row per angle using the final lab image. Record meters to a sensible precision, such as 0.01 m or 0.05 m. In Comparison, write shorter, middle, farthest, or very similar.
| Angle deg | Approximate reading m | Comparison | Confidence / reading note |
|---|---|---|---|
Choose two rows from your table and explain how you know the comparison is fair. Mention what stayed the same and what changed.
Compare and explain the pattern
10 min
Now use your table, not only your memory of the video.
According to your rows, which angle went farthest?
Explain the result by citing at least two angles and two readings from your table. Use the words angle, range, and evidence.
Short conclusion
6 min
Write a 4-5 line conclusion:
- which angle went farthest in your data;
- which two pieces of table evidence support that conclusion;
- one reason the image reading may not be exact to the centimeter.