A 8.9-kg puck, attached to the end of a horizontalstring, is rotated in a circle

Question

A 8.9-kg puck, attached to the end of a horizontalstring, is rotated in a circle of radius 8.8 m on a frictionlesshorizontal surface. If the string will break when the tension in itexceeds 91.6 N, what is the maximum speed the puck can have? Correct Answer : (9.52 × 100) A 8.9-kg puck, attached to the end of a horizontalstring, is rotated in a circle of radius 8.8 m on a frictionlesshorizontal surface. If the string will break when the tension in itexceeds 91.6 N, what is the maximum speed the puck can have? Correct Answer : (9.52 × 100)

Explanation / Answer

F=mv2/r rewrite to solve for v v=Fr/m Plug in and solve v=91.6*8.8/8.9 = 9.52 m/s

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