Add Leaderboard video-generation first-frame assets (batch 280/303)

.gitattributes

@@ -24674,3 +24674,61 @@ Leaderboard/Video[[:space:]]Generation/TriplePhysics/FrictionStop_SpringboardReb
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 Leaderboard/Video[[:space:]]Generation/TriplePhysics/FrictionStop_SpringboardRebound_BalloonTether__bg300__gYXVpV_trajectory/CineCamera_Moving/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
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+Leaderboard/Video[[:space:]]Generation/TriplePhysics/MovingHitsFixed_RollUpSlope_FrictionStop__bg266__2CfOa2_trajectory/CineCamera_1/rgb/0000.jpg filter=lfs diff=lfs merge=lfs -text
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Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_BalloonTether__bg300__iURRcf_trajectory/caption.txt

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+Two orange wheeled mechanisms propel the purple sphere forward. However, owing to the purple object's insufficient height, direct contact was not established. A massive, rough-textured, green-brown body impacts the underlying support structure from above, inducing elastic compression and upward rebound. Positioned above the mechanisms, a glossy green tethered balloon ascends. Taut tether lines anchored to the base constrain its vertical ascent, maintaining equilibrium between buoyant force and tension.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_BalloonTether__bg300__jpaVFC_trajectory/caption.txt

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+Two active cranks equipped with blue plastic wheels and light blue arms rotate synchronously, launching green plastic spheres. One sphere rolls significantly further forward due to lower resistance, whereas the other decelerates rapidly due to higher dissipative friction. A coconut descends vertically onto a gray-red-orange springboard, impacting and compressing the board before rebounding upward via elastic recovery. On the springboard, a balloon tethered to a grey rough brick ascends; its vertical motion is constrained by taut ropes fixed to the board, preventing infinite ascent and permitting limited buoyant lift.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_BalloonTether__bg300__rt63ox_trajectory/caption.txt

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+A crank equipped with purple reflective wheels and cyan arms rotates, propelling a green plastic ball forward along a surface. An isomorphic mechanism launches a second ball along a parallel trajectory. The first ball travels a greater distance owing to low rolling friction, whereas the second ball decelerates rapidly due to high dissipative friction. Simultaneously, a rough coconut falls vertically onto a salmon-colored rosewood diving board. Impact compresses the board surface, which rebounds via recovery of elastic potential energy. Above, a mossy grey-green rough tethered balloon ascends, its vertical motion constrained by a fixed taut rope below. Buoyancy supports the object, while the rope constraint prevents indefinite ascent, balancing air buoyancy against gravitational force.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_BalloonTether__bg300__tpb6nW_trajectory/caption.txt

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+Two cranks with pale gray wheels drive two orange spheres along adjacent surfaces. One sphere traverses a greater distance due to reduced rolling friction, whereas the other undergoes rapid deceleration due to greater dissipative forces on the secondary path. Below, a sand-colored coconut descends vertically onto a rough brown-purple reflective plate. The impact induces plate compression, followed by upward rebound via elastic recovery. Above the mechanism, a cyan balloon ascends, its vertical motion constrained by taut ropes fixed to the plate. These ropes limit unbounded ascent, allowing limited buoyancy within a designated region.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_BalloonTether__bg300__xuYaO7_trajectory/caption.txt

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+Two mechanisms equipped with golden wheels and grey arms rotate, propelling red plastic spheres. One sphere traverses a greater distance on a low rolling friction surface, while the other undergoes rapid deceleration on a high-dissipative friction surface. Concurrently, a brown soiled coconut impacts a pink, rough-striped, reddish-orange wooden object. The collision compresses the structure, facilitating an upward rebound via elastic potential energy restoration. Above, a pale blue tethered balloon ascends vertically. Buoyant forces drive the ascent until a taut rope anchored to the base plate constrains unbounded motion, ensuring the controlled vertical displacement remains confined within the system.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_MirrorReflect__bg250__4VrRWH_trajectory/caption.txt

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+A crank fitted with a reflective wheel and a rough mottled arm rotates, propelling a dark grey plastic sphere along a textured planar surface. The sphere traverses greater distances within smooth regions but ceases motion rapidly in rough regions due to kinetic friction. Above, a coconut shell descends, impacting a brown-grey elastic plate. The impact induces elastic compression of the plate, generating lateral deformation, followed by upward rebound. An elliptical mirror reflects the trajectories of the rotating crank, rolling sphere, and ascending shell, maintaining mutually non-interacting paths.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_MirrorReflect__bg250__9xMWlo_trajectory/caption.txt

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+A crank equipped with a purple reflective wheel and cyan arm drives a blue plastic sphere across surfaces of varying texture. Kinetic friction causes the sphere to cease motion more rapidly on rough surfaces, while it travels a greater distance on smooth surfaces. Above, a pebble-frosted coconut descends vertically, impacting a red-silver spring board. The board undergoes elastic compression inducing lateral deformation; upon restoration, it rebounds the coconut shell upward. An elliptical mirror reflects the motion of the rotating crank, rolling sphere, and ascending coconut, preserving trajectories without disturbance.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_MirrorReflect__bg250__Bvg75t_trajectory/caption.txt

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+A crank equipped with dark metal wheels and worn gray arms rotates, driving an orange plastic ball along a planar surface. The ball rolls farther on the smoother board but ceases motion more rapidly on the rougher board due to increased kinetic friction. Situated above the apparatus, a pebble-coconut falls vertically, striking a spring plate that undergoes elastic compression prior to rebounding. During impact, the spring plate undergoes lateral deformation, reverting to its original configuration as the pebble-coconut ascends. An oval mirror positioned to capture the scene reflects the motion of the crank, rolling ball, and bouncing pebble-coconut, maintaining trajectories without perturbation.

Leaderboard/Video Generation/TriplePhysics/FrictionStop_SpringboardRebound_MirrorReflect__bg250__F7i5g3_trajectory/caption.txt

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+A crank equipped with beige matte wheels and a red weathered arm rotates, driving a yellow sphere. The rolling sphere traverses a greater distance along the smooth section but ceases motion more rapidly on the rough surface due to increased kinetic friction. An orange matte object descends vertically, impacting a deformable support that undergoes elastic compression under load. During contact, the structure exhibits lateral deformation and recovers its configuration upon the object's rebound. Trajectory traces of the rotating crank, rolling sphere, and ascending object are preserved, characterizing undisturbed motion.