At t = 0, a particle is located at x = 25 m and has a velocity of 15 m/s in the positive x direction. The acceleration of the particle varies with time as shown in the diagram. What is the position of the particle at t = 5.0 s?
A. 175 m
B. 125 m
C. 138 m
D. 154 m
E. 165 m
Answer: D
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Two loudspeakers placed 6.00 m apart are driven in phase by an audio oscillator having a frequency range from 1595 Hz to 2158 Hz
A point P is located 4.70 m from one loudspeaker and 3.60 m from the other speaker. The speed of sound in the room is 344 m/s. At what frequency (or frequencies) of the oscillator does the sound reaching point P interfere destructively? (There could be more than one correct choice.) A) 2100 Hz B) 1720 Hz C) 1630 Hz D) 2130 Hz E) 2030 Hz
Which of the following statements about lunar phases is true?
A) It is possible to have two full moons during November, but not during December. B) The full moon sometimes rises around midnight. C) The time between new moons is two weeks. D) The time from one new moon to the next new moon is the same as the time from first-quarter moon to third-quarter moon. E) It is possible to have two full moons during January, but not during February.
A book rests on a level table top. Which force does Newton's third law imply is equal in magnitude but opposite in direction to the weight of the book?
A) the force of the table on the earth B) the force of the earth on the table C) the force of the book on the earth D) the force of the table on the book E) the force of the book on the table
The coefficients of static and kinetic friction between a 3.0-kg box and a horizontal desktop are 0.40 and 0.30, respectively. What is the force of friction that the desktop exerts on the box when a 15-N horizontal push is exerted on the box?
A) 12 N B) 8.8 N C) 15 N D) 6.0 N E) 4.5 N