Question

would you please solve as much as you can since their short questions?

22. Four identical balls of mass 0.6 kg are fastened to a massless rod whose total length is 1 m. The rod spins at 8 rad/s. The moment of inertia of this system, in units of kg m', is A) 0.61 D) 0.93 C) 1.81 B) 0.72 E) 1.22 A meter stick on a horizontal frictionless table top can rotate about the 80-cm mark. A 10 N force is applied at 0 cm. A second force F is applied at 60-cm. Both forces are perpendicular to the stick, and in the plane of the tabletop. It is found that the stick does not move. Answer the next two questions. 23 The magnitude of the torque exerted by the 10N force, in newton meters, is: A) 10 B) 60 C) 8 D) 12 E) 20 25. The force on the pivot is A) O D) 30 N opposite the direction of F B) 10 Nin the direction of F C) 10 N opposite the direction of F E) 30 N in the direction of F A woman on a frictionless rotating stool extends her arms outward. Answer the next two questions. 25. What happens to her angular momentum? A) It increases. D) It may increase or decrease depending on her initial angular velocity. E) It may increase or decrease depending on her angular acceleration. B) It decreases. C) It remains the same. 26. What happens to her rotational kinetic energy? A) It increases. D) It may increase or decrease depending on her initial angular velocity. E) It may increase or decrease depending on her angular acceleration. B) It decreases. C) It remains the same. 27. A rod rests on frictionless ice. Forces that are equal in magnitude and opposite in direction are simultaneously applied to its ends as shown at the right. The quantity that is zero is its: A) angular momentum D) kinetic energy B) angular acceleration E) rotational inertia C) linear momentum 28. A certain spring elongates 20 mm when it is suspended vertically and a block of mass M is hung on it. The natural frequency of this mass-spring system is about: A) 22 rad/s c) 82 rad/s B) 36 rad/s D) 124 rad/s E) 133 rad.s 29. A block attached to a spring oscillates in simple harmonic motion along the x axis. The limits of its motion are x = - 10 cm and x = 50 cm and it goes from one of these extremes to the other in 0.5 s. Its amplitude and frequency are: C) 40 cm, 1 Hz B) 30 cm, 2 Hz E) 30 cm, 1 Hz A) 40 cm, 1 Hz D) 25 cm, 2 Hz 30. In simple harmonic motion, the velocity is a maximum when the: A) acceleration is maximum D) kinetic energy is minimum B) displacement is maximum E) momentum is zero C) displacement is zero

Answer 1

30) ) displacemeut is zeno when x=0 V=WA = Vmal 25 C) 9t remains the Same. 26 B) 9t decseases రర