quankun1972004 quankun1972004

25-11-2022
Physics

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Câu 39: Một bánh đà dạng trụ đặc đồng chất có khối lượng 50 kg, bán kính 40 cm. Bánh đà bắt đầu quay nhanh dần với gia tốc 1,5 rad/s2. Động năng của bánh đà sau khi quay 1 phút là:
A. 16,2 KJ
B. 180 KJ
C. 40,5 KJ
D. 32,4 KJ

Respuesta :

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