7. [0/2 Points] DETAILS MY NOTES A 4.85-kg object is attached to a vertical rod by two strings as shown in the figure below. The object rotates in a horizontal circle at constant speed 6.80 m/s. 2.00 m ( 3.00 m m 2.00 m (a) Find the tension in the upper string. X Your response differs from the correct answer by more than 10% Double check your calculations. N (b.)..Find. the.tension in the lower string. x Enter a number. differs from the correct answer by more than 10%. Double check your calculations. N