Plan the investigation
What students will do
Use the student handout to organize predictions, measurements, and explanations.
- Predict the landing. Compare balls released from the same height with zero vertical velocity. Predict which reaches the ground first.
- Compare matching moments. Measure both balls’ positions and velocity components at the same time, then compare their first ground contacts.
- Explain with equations. Calculate vertical displacement and velocity. Sketch the horizontal and vertical position graphs for both balls.
- Test another height. Predict the effect of raising both release points, then check what changes and what stays the same.
What students will learn
- Use matched measurements to test component independence.
- Apply vertical kinematics to different horizontal motions.
- Support a landing-time explanation with numerical evidence.
Common misconception
Does a horizontally launched ball stay in the air longer?
Compare the vertical starting conditions and acceleration before deciding how sideways motion affects the fall.