Add Leaderboard video-generation first-frame assets (batch 181/205)

.gitattributes

@@ -15444,3 +15444,80 @@ Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushStationary_Vertical
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Leaderboard/Video Generation/DoublePhysics/CatapultLaunch_StickSupportFail__bg204__0h3lA4_trajectory/caption.txt

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+A grey, grainy, matte-finished barrel is launched from a catapult arm mounted on a grey, mottled semi-truck, following a parabolic trajectory governed by projectile motion under gravity. It ascends forward and upward, then descends along the curved path toward a red, wood-grained cube positioned on a rectangular wooden platform supported by four vertical posts; the platform rests on a greenish-gold, mottled road surface. As the barrel continues its descent, it impacts the red cube directly, delivering an impulsive force that induces mechanical stress in the supporting structure.

Leaderboard/Video Generation/DoublePhysics/CatapultLaunch_StickSupportFail__bg204__ARB3gn_trajectory/caption.txt

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+A metallic, reflective silver barrel is launched from a catapult arm mounted on a green, glossy truck with purple-and-red striated matte detailing; the barrel follows a parabolic trajectory governed by projectile motion under gravitational acceleration. It ascends forward and upward, then descends along the curved path toward a rectangular wooden platform supported by four vertical posts. The platform rests on an orange, smooth, glossy road surface. As the barrel continues its descent, it impacts the platform directly, delivering a force that stresses the supporting structure; all motion remains consistent with initial launch velocity from the catapult and subsequent gravitational arc.

Leaderboard/Video Generation/DoublePhysics/CatapultLaunch_StickSupportFail__bg204__nQQDGQ_trajectory/caption.txt

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+A golden, metallic, glossy barrel is launched from a catapult arm mounted on a weathered, mottled gray truck, following a parabolic trajectory under gravitational acceleration. It ascends forward and upward, then descends along the curved path toward a red, woven, glossy cube resting on a beige, matte, woven road surface. As the barrel continues its projectile motion, it collides directly with the cube, delivering an impact force that stresses the cube’s position on the surface. The supporting structure beneath the cube—comprising four vertical posts—is not visible in the frame; however, the cube remains stationary upon impact, indicating stable support. The scene adheres to rigid-body collision dynamics, with the barrel’s motion governed by gravity and the interaction constrained by conservation of momentum and structural integrity of the target.

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__AKqpOC_trajectory/caption.txt

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+A gray automobile advances forward, towing a tensile elastic cord attached to an aluminum birdcage. The cord maintains tension while undergoing elastic contraction, transmitting force from the automobile to the birdcage. This force accelerates the aluminum birdcage until its velocity equals that of the automobile. At this instant, relative motion ceases, and the system moves in unison. Throughout the kinematic process, the cord's elastic properties maintain the connection.

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__Dj6Llh_trajectory/caption.txt

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+A silver, smooth birdcage is tethered to the moss-covered rear of a vehicle via a stretched elastic cord. As the vehicle advances, the cord undergoes elastic contraction while remaining taut, transmitting tension from the vehicle to the birdcage. This tension accelerates the birdcage until its velocity equals that of the vehicle. At this point, relative motion ceases, and the system moves in unison.

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__DttmIX_trajectory/caption.txt

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+A golden birdcage is attached to the rear of a red plastic vehicle via a stretched elastic cord. As the vehicle advances, the cord elastically contracts while remaining taut, transmitting tension to the birdcage. This tension accelerates the birdcage until its velocity matches that of the vehicle. Consequently, relative motion ceases, and the system undergoes coupled motion. During the traction of the connected load, elasticity dominates energy transmission.

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__Fh4iyV_trajectory/caption.txt

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+A gray automobile accelerates forward, towing a blue relief birdcage via an elongated elastic tether. As the vehicle moves, tension transmits along the tether, dragging the birdcage across the ground. The elastic connector undergoes contraction under load, sustaining a fixed connection and applying force to the bodies. Frictional resistance opposes the dragging, yet the automobile's momentum ultimately enables the birdcage to achieve identical velocity. Following velocity synchronization, the system proceeds with coordinated motion, exhibiting no relative movement between the bodies. Throughout the acceleration phase, the cord remains taut, manifesting the constraint function of the connecting structure.

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__I34yPF_trajectory/caption.txt

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+A red dilapidated automobile advances, towing a silver smooth birdcage via a stretched elastic cord. As the vehicle progresses, the cord undergoes elastic contraction while maintaining tension, transmitting tensile force directly to the birdcage. This force accelerates the silver smooth birdcage until its velocity matches that of the automobile. Consequently, relative motion ceases, and the system proceeds in unified motion. The elastic constraint sustains the connection throughout the entire acceleration phase.

Leaderboard/Video Generation/DoublePhysics/ElasticCouple_CartMove__bg253__K9WlAD_trajectory/caption.txt

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+A reflective birdcage is secured to the rear of an orange automobile by a stretched elastic cord. As the vehicle proceeds, the cord remains taut, transmitting tension to the birdcage via elastic contraction. This force accelerates the birdcage until its velocity equals that of the automobile. Upon velocity synchronization, relative motion ceases, and the system translates as a unified body. The elastic constraint provides continuous tensile force during acceleration, connecting the two dynamic objects through a flexible connector while maintaining structural integrity throughout the motion process.