A rock have 3N of weight force, tied to a string of 2.5 m long, describes a horizontal circle of 2 m radius. The twine, fixed at one end, generates a conical surface. Determine:

a) The tensile strength of the wire, in newtons;
b) the frequency of rotation in Hz
consider g = 10 m / s ^ 2

Question

A rock have 3N of weight force, tied to a string of 2.5 m long,  describes a  horizontal circle of 2 m radius. The twine, fixed at one end, generates a conical surface. Determine:

a) The tensile strength of the wire, in newtons;
b) the frequency of rotation in Hz
consider g = 10 m / s ^ 2

anonymous · Answer

here tension in the string provides req Centripetaal force

anonymous · Answer

I coud to find the tension it's 5N, but the frequency of rotation is very 
hard

anonymous · Answer

v = 1/T

anonymous · Answer

you can find f by solve T

anonymous · Answer

why v= 1/T ?

anonymous · Answer

can you get velocity the rock goes around

anonymous · Answer

how? with that formula?

anonymous · Answer

you did find T right? then sum of rock's weight and tension must be central force.

anonymous · Answer

then you can get velocity by F=(mv^2)/r

anonymous · Answer

I din't know this formula

anonymous · Answer

why?? it's the force that is acting on object when the object moves circular motion

anonymous · Answer

so it's more easy that I thought, the ask is = 0.4
thank you

anonymous · Answer

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