A block on a level, frictionless surface and connected to a spring undergoes simple harmonic motion with amplitude A. At x = 0, which relationship is correct?
a. v < vmax
b. v = vmax
c. v > vmax
d. Not enough information to determine a relationship.
[Ques. 2] When a magnetic field causes a charged particle to move in a circular path, the only quantity listed below which the magnetic force changes significantly as the particle goes around in a circle is the particle's:
a. energy.
b. momentum.
c. radius for the circle.
d. time to go around the circle once.
[Ques. 3] The wave-related quantity algebraically equivalent to 1/f is
a. b. T
c. A d.
[Ques. 4] If a charged particle is moving in a uniform magnetic field, its path can be
a. a straight line.
b. a circle.
c. a helix.
d. any of the above.
[Ques. 5] When an object is moving in simple harmonic motion, which of the following is at a minimum when the displacement from equilibrium is zero?
a. the magnitude of the velocity
b. the magnitude of the acceleration
c. the kinetic energy
d. the total mechanical energy
[Ques. 6] A proton, which moves perpendicular to a magnetic field of 1.4 T in a circular path of radius 0.074 m, has what speed? (qp = 1.60 1019 C and mp = 1.67 1027 kg)
a. 7.3E+5 m/s
b. 2.8E+7 m/s
c. 5.1E+6 m/s
d. 9.9E+6 m/s
e. 3.9E+6 m/s
[Ques. 7] A mass-spring system on a horizontal frictionless surface is set in simple harmonic motion with amplitude A. The mass is then doubled and the system is again set into simple harmonic motion with the same amplitude. Which of the following is true about the total mechanical energy of the system due to doubling the mass?
a. It has doubled.
b. It has quadrupled.
c. It has halved.
d. It has not changed.
[Ques. 8] The path of a charged particle moving parallel to a uniform magnetic field will be a
a. straight line.
b. circle.
c. ellipse.
d. parabola.
[Ques. 9] A car with bad shocks bounces up and down with a period of 1.51 s after hitting a bump. The car has a mass of 1 600 kg and is supported by four springs of force constant k. What is k for each spring?
a. 6.9E+3 N/m
b. 1.7E+3 N/m
c. 1.7E+3 N/m
d. 3.5E+3 N/m
e. 8.2E+2 N/m
[Ques. 10] A deuteron, with the same charge but twice the mass of a proton, moves with a speed of 6.00 105 m/s perpendicular to a uniform magnetic field of 0.0525 T. Which of the paths described below would it follow? (qp = 1.60 1019 C and md = 3.34 1027 kg)
a. a straight-line path
b. a circular path of 61.1 cm radius
c. a circular path of 23.9 cm radius
d. a circular path of 2.14 cm radius
e. a circular path of 1.70 cm radius
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