- #1
elemnt55
- 7
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A CD has a mass of 18.0 g and a radius of 6.11 cm. When inserted into a player, the CD starts from rest and accelerates to an angular velocity of 19.6 rad/s in 0.768 s. Assuming the CD is a uniform solid disk, determine the net torque acting on it.
Formula I am using: .5MR^2 for the I which = 25.5208
Then the w= chg in radians/ chg in time
Then the a = chg in w/ chg in time
Net torque = Ia
so i get 1827.33J which isn't right
i also tried converting the g into kg and the cm into m but got wrong answer
Formula I am using: .5MR^2 for the I which = 25.5208
Then the w= chg in radians/ chg in time
Then the a = chg in w/ chg in time
Net torque = Ia
so i get 1827.33J which isn't right
i also tried converting the g into kg and the cm into m but got wrong answer