大学物理试题（College physics examination）.docVIP

大学物理试题（College physics examination） College physics examination questions First, the multiple-choice questions: (39 points) 1. (3 points) The acceleration of a particle moving at a radius of R is the magnitude of the acceleration (V means the velocity of a particle at any time) (A) (B) (C) (D) [[]] 2. (3 points) An object of mass m falls from the air and is affected by gravity as well as a resistance proportional to the square of velocity. The coefficient of proportionality is k, and K is the normal number. The closing velocity of the falling object (i.e., the speed at which the final object moves at uniform speed) will be (A) (B) (C) GK (D) [[]] 3. (3 points) A spring oscillator of M quality is placed horizontally at rest in equilibrium. As shown, a bullet with a mass of M is injected into the oscillator at a horizontal velocity and then moved along with it. If the level is smooth, then the maximum potential energy of the spring is (A) (B) (C) (D) [[]] 4. (3 points) A child of the quality of M stands on the edge of a horizontal platform with a radius of R. The platform can rotate freely through a vertical, smooth, fixed axis through its center. The moment of inertia is J. Both the platform and the child are stationary at the start. When the child suddenly moves counter clockwise toward the edge of the platform at a rate of V relative to the ground, the angular velocity and the rotation direction of the platform relative to the ground are (A) clockwise. (B) counter clockwise. (C) clockwise. (D) counter clockwise. [...] 5. (3 points) Two different ideal gases, if their most probable rates are equal, their (A) equal to the average rate, root mean square speed equal. (B) equal to the average rate, root mean square speed is not equal. (C) the average rate is not equal, the root mean square speed equal. (D) the average rate is not equal, not equal to the root mean square speed. [...] 6. (3 points) According to the second law of thermodynamics: (A) work can be converted t