calculations please

DATA TABLE 3 Purpose: To observe the effect of varying radius. 458, 5 Trial 1 Trial 2 Trial 3 Mass of bob Number of revolutions 25/ 25 25 Radius of circular path 18, 5 (m Total time ( ) 14.75 / 14. 96 / 14.82 Average time per revolution Average speed of bob (v) Time/revolution ( ) Computed value of centripetal force Computation of centripetal force (attach additional sheet) Direct measurement of centripetal force 10.25 N Percent difference DATA TABLE 4 (Optional) Purpose: To observe the effect of varying spring tension. Trial 1 Trial 2 Trial 3 Mass of bob 458 , 50 Number of revolutions 25 25 25 Radius of circular path 2 2cm Total time (SO 32,27/24.28 /30. 60 Average time per revolution Time/revolution ( ) Average speed of bob (v) Computation of centripetal force Computed value of (attach additional sheet) centripetal force Direct measurement of centripetal force 2.943 Percent difference