inta: 1 9) In a perfectly ELASTIC collision between two perfectly rigid objects A) both the momentum and the kinetic energy of the system are conserved. B) the momentum of each object is conserved. C) the momentum of the system is conserved but the kinetic energy of the system is not conserved. D) the kinetic energy of the system is conserved, but the momentum of the system is not conserved. E) the kinetic energy of each object is conserved. Points: 1 10) A horizontal disk rotates about a vertical axis through its center. Point P is midway between the center and the rim of the disk, and point Q is on the rim. If the disk turns with constant angular velocity, which of the following statements about it are true? (There may be more than one correct choice.) A) The linear acceleration of Q is twice as great as the linear acceleration of P. B) The linear acceleration of P is twice as great as the linear acceleration of Q C) The angular velocity of Q is twice as great as the angular velocity of P. D) P and Q have the same linear acceleration. E) Q is moving twice as fast as P. -oints: 2 11) A cable is 100 m long, has a cross-sectional area of 1.0 mm2, and is made of a material having a Young's modulus of 1.0 1011 N/m2. If a 1000-N force is applied to stretch the cable, how far does it stretch? A) 0.010 m B) 0.0010 m C) 0.10 m D) 1.0 m E) 10 m inta: 1 9) In a perfectly ELASTIC collision between two perfectly rigid objects A) both the momentum and the kinetic energy of the system are conserved. B) the momentum of each object is conserved. C) the momentum of the system is conserved but the kinetic energy of the system is not conserved. D) the kinetic energy of the system is conserved, but the momentum of the system is not conserved. E) the kinetic energy of each object is conserved. Points: 1 10) A horizontal disk rotates about a vertical axis through its center. Point P is midway between the center and the rim of the disk, and point Q is on the rim. If the disk turns with constant angular velocity, which of the following statements about it are true? (There may be more than one correct choice.) A) The linear acceleration of Q is twice as great as the linear acceleration of P. B) The linear acceleration of P is twice as great as the linear acceleration of Q C) The angular velocity of Q is twice as great as the angular velocity of P. D) P and Q have the same linear acceleration. E) Q is moving twice as fast as P. -oints: 2 11) A cable is 100 m long, has a cross-sectional area of 1.0 mm2, and is made of a material having a Young's modulus of 1.0 1011 N/m2. If a 1000-N force is applied to stretch the cable, how far does it stretch? A) 0.010 m B) 0.0010 m C) 0.10 m D) 1.0 m E) 10 m