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?
Answer:
The value is
Step-by-step 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

=>
![\theta = sin^(-1) [(mg)/( T) ]](https://img.qammunity.org/2021/formulas/physics/college/jt327qq90p4fcxdo2ajuruj3kiv1sekrwk.png)
=>
![\theta = sin^(-1) [(0.940 *9.8 )/( 120) ]](https://img.qammunity.org/2021/formulas/physics/college/u7xly7wyt4o88asgrh8m7nbd27hue1rmbp.png)
=>