4. A cylinder of mass 10.0 kg rolls without slipping on a horizontal surface. At the instant when its center of mass has a speed of 10.0 m/s, what is the cylinder’s total energy? (A) 200 J (B) 250 J (C) 500 J (D) 750 J (E) 1000 J

10. A nonconducting sphere of radius 10 cm has charge uniformly distributed throughout its volume. The electric field is directed radially outward and its strength at 5 cm from the center is 2000 N/C. What is the volume charge density of the sphere? (∈0 =8.85×10−12C2 /N·m 2 ）. (A) 1.06 µC/m3 (B) 2.12 µC/m3 (C) 3.16 µC/m3 (D) 4.06 µC/m3 (E) 5.18 µC/m3

4. A cylinder of mass 10.0 kg rolls without slipping on a horizontal surface. At the instant when its center of mass has a speed of 10.0 m/s, what is the cylinder’s total energy? (A) 200 J (B) 250 J (C) 500 J (D) 750 J (E) 1000 J

其他試題

4. A cylinder of mass 10.0 kg rolls without slipping on a horizontal surface. At the instant when its center of mass has a speed of 10.0 m/s, what is the cylinder’s total energy?
(A) 200 J
(B) 250 J
(C) 500 J
(D) 750 J
(E) 1000 J