The angular momentum of a rotating body is conserved when
A. when the body has a constant angular acceleration.
B. the shape of the body does not change.
C. no net force acts on the body.
D. no net torque acts on the body.
Answer: D
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Simple Harmonic Motion: If the frequency of a system undergoing simple harmonic motion doubles, by what factor does the maximum value of acceleration change?
A. 4
B. 2
C. 
D. 2/?
When static equilibrium is established for a charged conductor, the electric field just inside the surface of the conductor is
A) opposite to the field outside. B) equal to the perpendicular component of the field outside. C) equal to the field outside. D) zero. E) cannot be determined.
To increase the applied torque one can
A. Increase the force B. Increase the lever arm by moving to the end of the lever C. Increase the lever arm by applying the force perpendicularly to the lever D. All of the above E. None of the above
A river 100 m wide flows due south at 1 m/s. A boat that travels 1 m/s relative to the water is pointed due east as it crosses from the west bank. The boat reaches the east bank
A) due east of its starting point. B) 100 m farther south. C) 141 m farther south. D) none of the above