SEE (Secondary Education Examination, Nepal) · Science and Technology

Physics: motion, force and energy

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

Practise Physics: motion, force and energy now

Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 25 questions

  1. A car moving at 20 m/s brakes uniformly and stops in 5 s. What is its deceleration?
  2. A force of 30 N acts on a body of mass 6 kg on a smooth surface. What acceleration does it produce?
  3. A stone of mass 2 kg is lifted 5 m above the ground. Taking m/s², what potential energy does it gain?
  4. A bulb rated 60 W is switched on for 5 hours. How many units (kWh) of electrical energy does it use?
  5. A wire has a resistance of 4 ohm and carries a current of 3 A. What is the potential difference across it?
  6. Two resistors of 6 ohm and 3 ohm are joined in parallel. What is their combined resistance?
  7. Which instrument is used to measure the strength of an electric current?
  8. What is the SI unit of power?
  9. A pressure of 500 Pa acts on an area of 0.4 m². What force acts on that area?
  10. Sound travels at 340 m/s. An echo is heard 3 s after a shout. How far away is the reflecting wall?
  11. Which type of mirror is used as a rear-view mirror in vehicles?
  12. A lens has a focal length of 25 cm. What is its power?
  13. Which colour of white light is bent the most when it passes through a glass prism?
  14. What kind of energy conversion takes place in an electric generator?
  15. A transformer has 100 turns in the primary and 500 turns in the secondary coil. If the input is 20 V, what is the output voltage?
  16. A body is thrown vertically upward at 30 m/s. Taking m/s², what is the maximum height it reaches?
  17. A machine lifts a load of 400 N through 2 m when an effort of 100 N moves through 10 m. What is its efficiency?
  18. Which fact explains why a gas fills the whole container in which it is kept?
  19. Which law of motion says that every action has an equal and opposite reaction?
  20. A body of mass 4 kg moves with a velocity of 5 m/s. What is its momentum?
  21. What is the value of the acceleration due to gravity at the centre of the Earth?
  22. What is the weight of a body of mass 50 kg on the Earth? (g = 9.8 m/s²)
  23. The gravitational force between two bodies is F. What does it become if the distance between them is doubled?
  24. A force of 50 N moves a body 4 m in the direction of the force in 10 s. What power is developed?
  25. A stone dropped from the top of a cliff reaches the ground after 2 s. What is its speed just before it hits the ground? (g = 9.8 m/s²)

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