Briana swings a ball on the end of a rope in a circle. The rope is 1.5 m long. The ball completes a full circle every 2.2 s.

In one full turn, the ball travels the circle’s circumference: 2πr = 2π(1.5 m) ≈ 9.42 m. Divide that distance by the 2.2 s period to get a speed of about 9.42 ÷ 2.2 = 4.3 m/s, so the correct choice is 4.3 m/s.

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