Read and reason
Use a controlled simulation
The Projectile Explorer calculates a sequence of (x,y) locations for an ideal particle under constant downward gravity. The simulation changes speed, angle, initial height and g. Each parameter has a physical interpretation, and the model calculates impact without using any equipment. Your job is to make a prediction, change a single variable, log the output and explain whether the recorded values agree with the model.
Make two matched comparisons
First hold speed 10 m/s, height 0 m and gravity 9.8 m/s² fixed; compare 30° and 60°. Their ideal level-ground ranges are equal because sin(2θ) has the same value for complementary angles. Second hold angle, height and gravity fixed while comparing two speeds. The speed affects horizontal and vertical components and therefore the flight time and range.
Check the graph and table independently
The plotted path must begin at (0,h) and end at the calculated impact point (range,0). The data table should include a start point, several intermediate points, and impact. For each trial confirm that the value of x at landing is vx0×tflight and the value of y at impact is zero within rounding. Check both axis units and the declared coordinate system.
A virtual model is not a safety certificate
This is not designed for selecting real launch angles or launching hard objects. Real air drag, spin, obstacles, wind, local gravity and ground elevation affect actual trajectories. No test should involve firing, throwing or dropping hard materials near people or property. A supplied-data alternative allows the same mathematical evidence without manipulating sliders.