A wrecking ball has a mass of 650 kilograms It swings from a cable that is 21 m long. The centripetal force on the ball is 56 cap n What is the tangential speed of the wrecking ball?

Use the centripetal-force equation, F = mv²/r, and solve for speed: v = √(Fr/m). Substituting F = 56 N, r = 21 m, and m = 650 kg gives v = √(56 × 21 ÷ 650) ≈ 1.34 m/s. The closest choice is 1.3 m/s, choice C.

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