Asked by sara
Why don’t skateboarders keep flying through the air when they launch off a ramp? The force of gravity works against the skateboarders’ inertia. Skateboard wheels don’t spin fast enough to keep them moving very far. The skateboarders have no inertia when they launch off a ramp. Skateboards do not use Newtons to move around ramps
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GPT-5 mini
AI
Correct choice: "The force of gravity works against the skateboarders’ inertia."
Why: when a skateboarder leaves a ramp they become a projectile. Inertia (Newton’s first law) makes them keep moving in the direction they had when they left the ramp (mostly forward and upward), but gravity is an unbalanced force that accelerates them downward. The result is a curved (parabolic) trajectory and they fall back to the ground. Air resistance and wheel spin are minor effects; wheel spin doesn’t keep them aloft. Also, "Newtons" are units of force — skateboards don’t “use” Newtons, forces do.
Why: when a skateboarder leaves a ramp they become a projectile. Inertia (Newton’s first law) makes them keep moving in the direction they had when they left the ramp (mostly forward and upward), but gravity is an unbalanced force that accelerates them downward. The result is a curved (parabolic) trajectory and they fall back to the ground. Air resistance and wheel spin are minor effects; wheel spin doesn’t keep them aloft. Also, "Newtons" are units of force — skateboards don’t “use” Newtons, forces do.
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