Answer:
Though you have not gave the choices, I do believe it is “testing”
Explanation:
Answer:

Explanation:
As we know that tension force in the string will be equal to the centripetal force on the string
so we will have

now we have

now we have


now when string length is 0.896 m and its speed is 71.5 m/s then we will have



<span>0.0001 km / year or 10^-5 km/year just take 50 km and divide it by 5 million</span>