6. Questions 6-8 are about the following situation: The pulley shown in the figure has a mass of 2.0 kg and radius 0.5 m. It is fixed in place so it can only rotate about its center. Someone pulls with a force F = 5.0 N on a string tied around it as shown. What is the magnitude of the torque caused by this person? Express your answer in Nm and input the number only. F 7. The pulley can be approximated as a solid disk. The moment of inertia is of a solid disk of mass M and radius R is 1/2MR. What is the magnitude of the angular acceleration of the pulley? (Magnitude only, no direction). Express your answer in rad/s and input the number only. 8. The pulley rotates for some time until its angular speed is 25 rad/s. At that time, what is its rotational kinetic energy? Express your answer in Joules and input the number only.