Add freefall/8 (subset100 eval datasource)

freefall/8/annotation.txt

@@ -0,0 +1,3 @@
+Environment: g=-3.8, F_drag=0.0
+Ground: e = 0.25
+BronzeAntiqueSphere: d = 2.0, e = 0.45, h = 15.0, v_0 = 0.0

freefall/8/formula_info.json

@@ -0,0 +1,14 @@
+{
+  "correct_letter": "B",
+  "correct_formula": "v = v_0 + g·t",
+  "annotation": "Environment: g=-3.8, F_drag=0.0\nGround: e = 0.25\nBronzeAntiqueSphere: d = 2.0, e = 0.45, h = 15.0, v_0 = 0.0",
+  "choices": [
+    "F_fall = m·g·(1 + v/c) / √(1 - v²/c²)",
+    "v = v_0 + g·t",
+    "Q = m·c·ΔT",
+    "P + (1/2)·ρ·v² + ρ·g·h = constant"
+  ],
+  "correct_index": 1,
+  "physics_type": "FreeFall",
+  "seed": "FreeFall|benchmark/freefall/8"
+}

freefall/8/initial_state/instance_segmentation_0000.npy

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d68fc5fdb115579dc1221d6b84bc8df8cd25d1317313b77318af37f7929f939d
+size 1843328

freefall/8/initial_state/instance_segmentation_mapping_0000.json

@@ -0,0 +1 @@
+{"1": "INVALID", "2": "/World/Ground", "3": "/World/BronzeAntiqueSphere"}

freefall/8/instance_segmentation/maps.npz

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:558cb513373a02e58109c9c6d75a53c8cb9e12ff827e2acba5aa5d87dcbe5fff
+size 548774

freefall/8/instantaneous_velocity/velocity.json

@@ -0,0 +1,31 @@
+{
+  "time_seconds": 2.5,
+  "labels": [
+    {
+      "prim_path": "/World/BronzeAntiqueSphere",
+      "speed": 9.5158109664917,
+      "label_str": "$v=9.52$",
+      "label_x": 664,
+      "label_y": 634,
+      "label_w": 98,
+      "label_h": 31,
+      "center_2d": [
+        639.5156605922551,
+        550.4510250569476
+      ],
+      "velocity": [
+        0.0,
+        0.0,
+        -9.5158109664917
+      ],
+      "arrow_start": [
+        639.5156605922551,
+        550.4510250569476
+      ],
+      "arrow_end": [
+        639.5156605922551,
+        650.4510250569476
+      ]
+    }
+  ]
+}

freefall/8/mask/maps.npz

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:ffa58d87ed9aca4d0e5fa967ae190ab891b7bfa6e39499a75f84ae1d0695907b
+size 939457

freefall/8/physics_duration.txt

@@ -0,0 +1 @@
+2.5