Add Leaderboard video-generation first-frame assets (batch 115/303)

.gitattributes

@@ -17953,3 +17953,75 @@ Leaderboard/Video[[:space:]]Generation/DoublePhysics/FixedConvexRedirect_RotBoar
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Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__bNs6LZ_trajectory/caption.txt

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+A silver reflective bell is situated on a rotating cylindrical platform. A blue plastic laser pointer directs a beam toward an adjacent convex mirror. During rotation, the beam reflects off the mirror's curved surface. The bell rotates with the platform until the platform abruptly ceases motion. Owing to inertia, the bell retains its tangential velocity, detaches, and slides forward along the surface. The laser beam trajectory persists uninterrupted, unaffected by the mechanical cessation.

Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__bsD4qC_trajectory/caption.txt

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+A dark metal bell rests upon a rotating rough brown box. A red plastic laser pointer emits a beam toward a nearby convex mirror, where the beam reflects off the mirror's curved surface. As the box rotates, the bell rotates synchronously. Upon the box stopping abruptly, the bell retains its tangential velocity due to inertia. The bell subsequently detaches from the box and slides forward on the ground.

Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__dCodT0_trajectory/caption.txt

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+A golden bell is statically positioned on a rotating cylindrical platform. A yellow laser pointer directs a beam toward a nearby convex mirror. The beam reflects off the curved surface of the mirror. During rotation, the bell co-rotates with the platform. The platform abruptly ceases motion. Owing to inertia, the bell retains its tangential velocity, detaches from the platform, and slides forward along the ground.

Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__hrAil1_trajectory/caption.txt

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+A golden metallic object is situated in a stationary position on a rotating cylindrical platform. Concurrently, a light beam impinges upon an adjacent convex mirror. The light reflects from the mirror's curved surface, altering its propagation path. During the platform's rotation, the object undergoes synchronous rotational motion. The platform abruptly ceases rotation without contacting the golden object; consequently, the object undergoes no translational displacement.

Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__nxcQS2_trajectory/caption.txt

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+A salmon-colored laser pointer directs a beam toward a convex mirror, undergoing reflection from the curved surface. A hollow aluminum bell rests upon a rotating cylindrical platform, co-rotating with the apparatus. Upon the abrupt cessation of platform rotation, inertia causes the bell to maintain its instantaneous tangential velocity. Consequently, the bell detaches from the support and slides forward along the ground.

Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__tBJsdG_trajectory/caption.txt

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+A red reflective bell rests upon a rotating brown box, while a laser pointer directs a beam toward a convex mirror. Light reflects off the curved surface, and the rotation of the box drives the rotation of the bell. Rotation ceases abruptly; due to inertia, the bell retains its tangential velocity. The bell detaches from the box and slides forward along the surface. When the object passes the initial position, the reflected beam continues propagating outward.

Leaderboard/Video Generation/DoublePhysics/FixedConvexRedirect_RotBoardInertia__bg234__thb0LW_trajectory/caption.txt

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+A yellow bell is positioned atop a rotating white cylindrical platform. Concurrently, a gray, aged laser pointer directs a beam toward a convex mirror, where the beam is reflected by the mirror's curved surface. As the platform rotates, the bell rotates synchronously. Upon the platform's abrupt cessation of rotation, inertia causes the bell to maintain its tangential velocity. The bell subsequently detaches from the platform and slides forward along the ground. The beam continues without interruption.

Leaderboard/Video Generation/DoublePhysics/FrictionStop_CrankPush__bg261__7iPqQO_trajectory/caption.txt

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+An active crank comprising a gold wheel and grey matte arm rotates, driving two yellow spheres constrained between parallel surfaces. The crank converts rotational motion into linear displacement, imparting an identical initial impulse to each sphere. The sphere traversing the smoother surface maintains forward motion for a longer duration, whereas the sphere situated on the rougher surface decelerates more rapidly due to higher kinetic friction. Friction is proportional to surface texture, impeding motion and generating differential energy dissipation. Although the mechanism provides uniform input, the subsequent divergence of trajectories arises solely from disparities in the kinetic friction coefficients between each sphere and the surface interface.

Leaderboard/Video Generation/DoublePhysics/FrictionStop_CrankPush__bg261__AYtvBs_trajectory/caption.txt

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+A crank equipped with a reflective indigo wheel and an aluminum arm rotates, driving two blue plastic balls into linear displacement along two paths. One ball maintains forward motion longer on a smooth path, while the other experiences more rapid deceleration on a rough path due to higher kinetic friction. Frictional forces proportional to path texture impede motion and induce differential energy dissipation. Although the crank mechanism provides identical initial impulses to both balls, the subsequent trajectory divergence stems solely from differing coefficients of kinetic friction at each ball-path interface.