Shoot for Your Grade — predict where the ball lands, place the target, take one shot
Floor (top view)— drag the target along the floor, or type the bullseye distance. x is measured from the plumb line under the table edge.
Bullseye at x = cm
Lab setup
Group:
Table height H (m)
Ramp release height h (m)
🔒 Random lab table: H and h are hidden — measure them with the meter stick.
Photogate spacing D = m · Timer:
Measurements (practice rolls):
Your prediction
H = m D = m Δt = s
10
Teacher settings
Model:
g = m/s² · ·
Bullseye radius cm · ring width cm · miss score
Official shots per setup · stopwatch error SD s ·
Extension: reverse challenge — find the ramp height
The teacher puts a target at a fixed spot. Do practice rolls from any test height, measure v, then work out the release height h that lands the ball on the bullseye. Hint: x = v√(2H/g), and v ∝ √h, so hneeded = htest·(vneeded/vtest)².