Answer to Question 4
For the circular disc I = [2.5 kg x (0.2 m)2 ] ÷ 2 = 0.05 kg m2 For the hollow cylinder: I = 0.1 kg m2 (why?) For the solid sphere: I = [2 x 2.5 kg x (0.2 m)2 ] ÷ 5 = 0.04 kg m2
For the circular disc
I = [2.5 kg x (0.2 m)2 ] ÷ 2 = 0.05 kg m2
For the hollow cylinder:
I = 0.1 kg m2 (why?)
For the solid sphere:
I = [2 x 2.5 kg x (0.2 m)2 ] ÷ 5 = 0.04 kg m2
