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Centripetal force is the inward force required to keep an object moving in a circular path. Without it, the object would fly off in a straight line tangent to the circle. F_c = mv²/r = mω²r.

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1. 1F_c = m × v² / r (mass × velocity² / radius)
2. 2Or: F_c = m × ω² × r (using angular velocity ω in rad/s)
3. 3Centripetal acceleration: a_c = v² / r

解いた例