MCAT (Medical College Admission Test) · Chemical and Physical Foundations of Biological Systems

Physics

61 practice questions, each with the answer and an explanation.

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All 61 questions

  1. A net force of 6 N acts on a 2 kg object. What is its acceleration?
  2. An object falls from rest for 2.0 s in the absence of air resistance. How far does it fall? (use g = 10 m/s squared)
  3. What is the kinetic energy of a 2.0 kg object moving at 3.0 m/s?
  4. How much work is done in lifting a 5.0 kg box vertically by 2.0 m at constant speed? (use g = 10 m/s squared)
  5. A machine does 600 J of work in 3.0 s. What is its power output?
  6. What is the gauge pressure at a depth of 5.0 m in fresh water? (density 1000 kg/m3, g = 10 m/s squared)
  7. According to Archimedes' principle, the buoyant force on a submerged object equals what?
  8. Water flows through a pipe that narrows. What happens to the speed and the pressure of the water in the narrow section?
  9. A 12 V battery is connected across a 4.0 ohm resistor. What current flows?
  10. Two resistors of 6 ohms and 3 ohms are connected in parallel. What is their equivalent resistance?
  11. A current of 3.0 A flows through a 4.0 ohm resistor. How much power is dissipated?
  12. The plates of a parallel-plate capacitor are moved so the separation doubles, with the plate area unchanged. What happens to the capacitance?
  13. A sound wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is its speed?
  14. A source of sound moves toward a stationary listener. How does the frequency heard by the listener compare with the frequency emitted?
  15. Light passes from air into glass at an angle to the normal. How does the ray bend?
  16. An object is placed beyond twice the focal length of a converging lens. What type of image forms?
  17. In the photoelectric effect, what determines the maximum kinetic energy of the emitted electrons?
  18. A radioactive isotope has a half-life of 10 days. What fraction of a sample remains after 30 days?
  19. A net force acts on a 0.5 kg object and gives it an acceleration of 8 m/s^2. What is the magnitude of the net force?
  20. An object is placed 30 cm in front of a converging lens of focal length 15 cm. At what distance from the lens is the image formed?
  21. An object starts at 4 m/s and accelerates at 2 m/s^2 for 3 s. How far does it travel?
  22. What is the kinetic energy of a 2 kg object moving at 4 m/s?
  23. How much heat is needed to warm 0.5 kg of a substance with a specific heat of 4186 J/(kg K) by 20 K?
  24. A 12 V battery is connected to a 4 ohm resistor and a 2 ohm resistor in series. What current flows through the circuit?
  25. A 24 V battery is connected to a 6 ohm resistor and a 6 ohm resistor in series. What current flows through the circuit?
  26. What is the equivalent resistance of a 30 ohm and a 20 ohm resistor connected in parallel?
  27. How much heat is needed to warm 1.5 kg of a substance with a specific heat of 4186 J/(kg K) by 5 K?
  28. An object is placed 24 cm in front of a converging lens of focal length 12 cm. At what distance from the lens is the image formed?
  29. An object starts at 10 m/s and accelerates at 1 m/s^2 for 4 s. How far does it travel?
  30. A wave has a frequency of 256 Hz and a wavelength of 1.33 m. What is its speed?
  31. A net force acts on a 2 kg object and gives it an acceleration of 3 m/s^2. What is the magnitude of the net force?
  32. A stone is dropped from rest from a height of 125 m. Using g = 10 m/s^2 and ignoring air resistance, how long does it take to reach the ground?
  33. A wave has a frequency of 100 Hz and a wavelength of 3.4 m. What is its speed?
  34. What is the kinetic energy of a 10 kg object moving at 3 m/s?
  35. What is the equivalent resistance of a 10 ohm and a 15 ohm resistor connected in parallel?
  36. An object with an initial speed of 10 m/s accelerates uniformly at 1.5 m/s^2 for 8 s. What is its final speed?
  37. What is the kinetic energy of a 3 kg object moving at 6 m/s?
  38. What is the equivalent resistance of a 20 ohm and a 5 ohm resistor connected in parallel?
  39. A 9 V battery is connected to a 3 ohm resistor and a 6 ohm resistor in series. What current flows through the circuit?
  40. A wave has a frequency of 50 Hz and a wavelength of 6 m. What is its speed?
  41. A net force acts on a 10 kg object and gives it an acceleration of 1.5 m/s^2. What is the magnitude of the net force?
  42. How much heat is needed to warm 0.25 kg of a substance with a specific heat of 450 J/(kg K) by 40 K?
  43. A wave has a frequency of 440 Hz and a wavelength of 0.75 m. What is its speed?
  44. Two point charges of +1 microcoulombs and +4 microcoulombs are 0.2 m apart. Using k = 9 x 10^9 N m^2/C^2, what is the magnitude of the force between them?
  45. What is the equivalent resistance of a 6 ohm and a 3 ohm resistor connected in parallel?
  46. A 18 V battery is connected to a 3 ohm resistor and a 6 ohm resistor in series. What current flows through the circuit?
  47. An object starts at 0 m/s and accelerates at 6 m/s^2 for 3 s. How far does it travel?
  48. An object is placed 60 cm in front of a converging lens of focal length 20 cm. At what distance from the lens is the image formed?
  49. Two point charges of +2 microcoulombs and +3 microcoulombs are 0.3 m apart. Using k = 9 x 10^9 N m^2/C^2, what is the magnitude of the force between them?
  50. A stone is dropped from rest from a height of 45 m. Using g = 10 m/s^2 and ignoring air resistance, how long does it take to reach the ground?
  51. A 30 V battery is connected to a 10 ohm resistor and a 5 ohm resistor in series. What current flows through the circuit?
  52. Two point charges of +3 microcoulombs and +3 microcoulombs are 0.6 m apart. Using k = 9 x 10^9 N m^2/C^2, what is the magnitude of the force between them?
  53. What is the equivalent resistance of a 12 ohm and a 4 ohm resistor connected in parallel?
  54. An object with an initial speed of 2 m/s accelerates uniformly at 4 m/s^2 for 5 s. What is its final speed?
  55. What is the kinetic energy of a 0.5 kg object moving at 10 m/s?
  56. An object is placed 15 cm in front of a converging lens of focal length 10 cm. At what distance from the lens is the image formed?
  57. An object is placed 30 cm in front of a converging lens of focal length 10 cm. At what distance from the lens is the image formed?
  58. Two point charges of +5 microcoulombs and +2 microcoulombs are 0.1 m apart. Using k = 9 x 10^9 N m^2/C^2, what is the magnitude of the force between them?
  59. A wave has a frequency of 20 Hz and a wavelength of 17 m. What is its speed?
  60. A net force acts on a 5 kg object and gives it an acceleration of 4 m/s^2. What is the magnitude of the net force?
  61. A stone is dropped from rest from a height of 5 m. Using g = 10 m/s^2 and ignoring air resistance, how long does it take to reach the ground?

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