Add Leaderboard video-generation first-frame assets (batch 193/205)

.gitattributes

@@ -16460,3 +16460,89 @@ Leaderboard/Video[[:space:]]Generation/TriplePhysics/WindPushStationary_WindDefl
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Leaderboard/Video Generation/DoublePhysics/MovingHitsMoving_ObliqueProjectile__bg291__GMzBRR_trajectory/caption.txt

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+A rectangular box follows a parabolic trajectory under gravitational acceleration while a dark-colored sedan moves horizontally across a sandy surface. As the box descends, its vertical velocity increases steadily due to gravity. Upon contacting the car’s roof, an oblique collision occurs: the box’s linear momentum is partially transferred to the car, resulting in altered translational velocities for both objects, consistent with conservation of linear momentum. The impact geometry induces a redistribution of kinetic energy between translational and rotational degrees of freedom, constrained by the point and angle of contact.

Leaderboard/Video Generation/DoublePhysics/MovingHitsMoving_ObliqueProjectile__bg291__NNdPKT_trajectory/caption.txt

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+A rectangular cardboard box follows a parabolic trajectory under gravitational acceleration, descending toward a dark-colored sedan traveling horizontally across a sandy surface. As the box approaches impact, its vertical velocity increases continuously due to gravity. It collides with the car’s roof at an oblique angle, resulting in an inelastic collision where linear momentum is conserved for the system. The offset impact point and angle induce rotational motion in both the box and the sedan, converting part of the box’s translational kinetic energy into angular kinetic energy; total mechanical energy remains conserved in the absence of non-conservative work. The sedan experiences a slight lateral displacement and change in velocity due to the impulse, while the box rebounds with diminished translational speed and a newly acquired angular velocity.

Leaderboard/Video Generation/DoublePhysics/MovingHitsMoving_ObliqueProjectile__bg291__laFOIT_trajectory/caption.txt

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+A rectangular wooden crate follows a parabolic trajectory under gravitational acceleration, descending toward a dark-colored sedan traveling horizontally across a sandy surface. As the crate approaches impact, its vertical velocity increases continuously due to gravity. It collides with the car’s roof at an oblique angle, initiating a momentum-exchanging interaction: linear momentum is transferred between the crate and the vehicle. The geometry of contact—specifically the offset impact point and incidence angle—converts a portion of the crate’s translational kinetic energy into rotational kinetic energy, imparting angular motion to both bodies post-collision, while the total mechanical energy of the isolated system remains conserved. The sedan’s path deviates slightly upward and forward as a result of the impulse, and the crate rebounds with a modified linear velocity vector and induced spin, all consistent with the principles of conservation of linear and angular momentum, and mechanical energy.

Leaderboard/Video Generation/DoublePhysics/MovingHitsMoving_ObliqueProjectile__bg291__maIvG9_trajectory/caption.txt

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+A rectangular box follows a parabolic trajectory under gravitational acceleration, descending toward a dark-colored sedan traveling horizontally across a sandy surface. As it approaches impact, the box’s downward velocity increases continuously. It collides with the car’s roof at an oblique angle, triggering a momentum-conserving interaction between the two bodies. Due to the off-center contact point and impact angle, a portion of the box’s translational kinetic energy is converted into rotational kinetic energy for both the box and the sedan, while the total mechanical energy of the isolated system remains conserved. The sedan experiences a slight lateral displacement and trajectory deflection due to the impulsive force, and the box rebounds with diminished linear speed and newly acquired angular velocity.

Leaderboard/Video Generation/TriplePhysics/BalloonFloat_FixedConvexRedirect_MirrorReflect__bg275__1wvnzp_trajectory/caption.txt

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+An orange laser pointer emits a beam from above a red box toward a metallic bowl. The light reflects off the metallic surface onto a silver mirror, altering the optical trajectory. Concurrently, a blue plastic balloon ascends vertically under the influence of buoyant force, intersecting the laser path and obstructing the beam before continuing its ascent. Upon clearing the obstruction, the light ray resumes its initial trajectory.

Leaderboard/Video Generation/TriplePhysics/BalloonFloat_FixedConvexRedirect_MirrorReflect__bg275__TxYHlZ_trajectory/caption.txt

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+A laser beam emanates from a pointer positioned atop a stack of pale green matte boxes, striking a metallic bowl resting on a separate stack; the beam reflects toward a nearby silver convex mirror, which further redirects it along the optical path. Concurrently, an orange spherical balloon ascends vertically through the air, buoyed upward by net buoyant force, briefly intersecting the laser’s trajectory and momentarily occluding it before resuming its unimpeded ascent. The balloon remains untethered and freely floating, while the optical configuration—governed by specular reflection and the convex curvature of the mirror—remains otherwise undisturbed, except during the transient blockage.

Leaderboard/Video Generation/TriplePhysics/BalloonFloat_FixedConvexRedirect_MirrorReflect__bg275__Z0BsJN_trajectory/caption.txt

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+A laser beam emanates from a laser pointer positioned atop a stack of pinkish-brown fibrous boxes and strikes a metallic bowl resting on a separate stack; the beam reflects toward a nearby silver, smooth mirror, which further redirects it. Concurrently, an orange spherical balloon ascends vertically through the air, buoyed upward by net positive buoyant force, briefly intersecting the laser’s path and momentarily occluding it before continuing its rise. The balloon remains unsupported except by buoyancy—no string or tether is visible—and follows a trajectory consistent with unimpeded vertical ascent under constant upward net force. The mirror functions as a convex reflector, gently diverging the reflected beam.

Leaderboard/Video Generation/TriplePhysics/BalloonFloat_FixedConvexRedirect_MirrorReflect__bg275__ZifT3B_trajectory/caption.txt

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+A grey laser beam is projected from above onto a metallic bowl, reflecting light toward a nearby convex mirror. Concurrently, a red spherical balloon ascends vertically subject to buoyant force. The balloon briefly traverses the laser path, interrupting the beam before continuing upward motion. Light is redirected via the bowl surface while the sphere ascends independently. This sequence records the displacement of air columns as a floating object crosses the optical axis. Reflection dominates light redirection, whereas buoyancy maintains the balloon's vertical trajectory.

Leaderboard/Video Generation/TriplePhysics/BalloonFloat_FixedConvexRedirect_MirrorReflect__bg275__v8s1jP_trajectory/caption.txt

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+A laser beam emanates from a laser pointer positioned atop a stack of green, mottled, glossy rectangular blocks, striking a metallic, hemispherical bowl resting on a separate stack of identical blocks; the beam reflects off the bowl’s convex inner surface toward a nearby silver, smooth, convex mirror, which further redirects the light along a new path. Concurrently, an orange spherical balloon ascends vertically through the air under the influence of buoyancy, transiently intersecting the laser’s trajectory and briefly obscuring it before resuming its upward motion. The balloon remains untethered and freely floating, while the laser’s emission, reflection sequence, and spatial configuration proceed uninterrupted.