A cyclist rides at a constant speed of 4 point 5 m/s around a curve. If the centripetal acceleration is 29 m/s squared , what is the radius of the curve?

For motion around a curve, centripetal acceleration is a = v²/r, so the radius is r = v²/a. Substituting the speed of 4.5 m/s and acceleration of 29 m/s² gives r = (4.5)²/29 = 20.25/29 ≈ 0.70 m. Therefore, the correct choice is 0.70 m.

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