FUVEST (University of São Paulo Entrance Exam) · Mathematics and Physics

Physics

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

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All 21 questions

  1. Which statement correctly gives the SI unit of force?
  2. A car travels at 72 km/h. What is this speed in metres per second?
  3. A stone falls from rest for 3 s. Taking g = 10 m/s^2 and ignoring air, how far does it fall?
  4. What net force gives a 1200 kg car an acceleration of 2 m/s^2?
  5. What is the kinetic energy of a 2 kg body moving at 3 m/s?
  6. A 12 V source is connected across a 4 ohm resistor. What current flows?
  7. Resistors of 6 ohm and 3 ohm are connected in parallel. What is the equivalent resistance?
  8. A ball is thrown horizontally at 20 m/s from a 45 m cliff (g = 10 m/s^2). How far from the base does it land?
  9. How much heat is needed to raise 2 kg of water (c = 4200 J/kg per degree) by 10 degrees Celsius?
  10. A wave has frequency 50 Hz and speed 340 m/s. What is its wavelength?
  11. A 50 kg load is lifted 10 m in 10 s (g = 10 m/s^2). What is the average power?
  12. A 2 kg cart at 3 m/s hits a 1 kg cart at rest and they stick together. What is their speed afterwards?
  13. A force of 200 N acts perpendicularly on an area of 0.5 m^2. What is the pressure?
  14. A rocket pushes gas backwards and the gas pushes the rocket forwards. Which law describes this?
  15. A ray of light passes from air into glass at an angle. What happens to its direction?
  16. A cube of density 800 kg/m^3 floats in water (1000 kg/m^3). What fraction of its volume is submerged?
  17. A 60 W lamp stays on for 5 hours. How much energy does it use?
  18. A concave mirror has focal length 10 cm. An object is 30 cm in front. Where is the image?
  19. A body moves uniformly in a circle of radius 5 m at 10 m/s. What is its centripetal acceleration?
  20. A sealed rigid container of gas is heated from 300 K to double its absolute pressure. What is the final temperature?
  21. What kind of wave is a sound wave in air?

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