4. A rock of mass 4.0 x 102 g is tied to one end of a string that is 2.0 m in length. Holding the other end above his head, a boy swings the rock around in a circle whose plane is parallel to the ground. c. If the string can withstand a maximum tension of 4.5 N before breaking, what angle to the vertical does the string reach just before breaking? d. At what speed is the rock travelling just as the string breaks?

College Physics
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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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4. A rock of mass 4.0 × 102 g is tied to one end
of a string that is 2.0 m in length. Holding the other end
above his head, a boy swings the rock
around in a circle whose plane is parallel to the ground.
If the string can withstand a maximum
tension of 4.5 N before breaking, what
angle to the vertical does the string
reach just before breaking?
d. At what speed is the rock travelling just
as the string breaks?
Transcribed Image Text:4. A rock of mass 4.0 × 102 g is tied to one end of a string that is 2.0 m in length. Holding the other end above his head, a boy swings the rock around in a circle whose plane is parallel to the ground. If the string can withstand a maximum tension of 4.5 N before breaking, what angle to the vertical does the string reach just before breaking? d. At what speed is the rock travelling just as the string breaks?
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