If the breaking strength of the string is 120 N, what is the minimum angle the string can make with the horizontal

Complete Question

A 940-g rock is whirled in a horizontal circle at the end of a 1.30-m-long string,  If the breaking strength of the string is 120 N, what's the minimum angle the string can make with the horizontal?

The value is      

Explanation:

From the question we are told that

  The mass of the rock is  

   The length of the string is

    The breaking strength(i.e the maximum tension) on the string is

Gnerally the vertical component of the tension experienced by the string is mathematically represented as

Generally this vertical component  of tension is equivalent to the weight of the rock

So

=>  

=>    

=>          

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