A 0.25 kg steel ball is tied to the end of a string and then whirled in a vertical circle at a constant speed v. The length of the string is 0.62 m, and the tension in the string when the ball is at the top of the circle is 4.0 N. What is v

Question

Physics

Maren Raymond

19 February, 06:36

A 0.25 kg steel ball is tied to the end of a string and then whirled in a vertical circle at a constant speed v. The length of the string is 0.62 m, and the tension in the string when the ball is at the top of the circle is 4.0 N. What is v

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Haylie Donaldson · Answer 1

Let the tension in the string be T. At the top of the circle, total force acting on them = T + mg. This will provide centripetal force

T + mg = m v² / r

4 +.25 x 9.8 =.25 x v² /.62

6.45 =.25 v² /.62

v² = 16

v = 4 m / s.