SIMAK UI · Natural Sciences (Kemampuan IPA)

Physics: Mechanics, Waves and Thermodynamics

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

Practise Physics: Mechanics, Waves and Thermodynamics now

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

All 18 questions

  1. A 2 kg block slides down an incline of angle with a constant speed. What is the coefficient of kinetic friction between the block and the incline?
  2. A car of mass 1200 kg travelling at 20 m/s brakes uniformly to a stop over a distance of 40 m. What is the magnitude of the net braking force acting on the car?
  3. A simple pendulum has period on Earth. If its length is multiplied by 4 and it is taken to a planet where gravitational acceleration is , what is its new period?
  4. An ideal gas undergoes an isobaric expansion at , increasing its volume from to . How much work is done by the gas?
  5. A sound wave travels from air into water. Which wave property remains completely unchanged during this transition?
  6. A heat engine operates between temperatures of and . If it absorbs of heat from the hot reservoir, what is the maximum theoretical work it can output?
  7. A 500 g ball dropped from a height of 20 m hits the ground and rebounds to a height of 5 m. What is the magnitude of the impulse delivered by the ground to the ball? ()
  8. Two point charges and are separated by 30 cm. At what distance from the charge along the connecting line is the net electric field zero?
  9. A light ray passes from crown glass () into water (). What is the critical angle for total internal reflection at this boundary?
  10. A 100 turns coil of cross-sectional area is placed in a magnetic field changing at a constant rate of . What is the magnitude of the induced electromotive force (EMF)…
  11. In a double-slit interference experiment with slit separation and screen distance , the fringe spacing is . What is the wavelength of the light used?
  12. A mass on a spring oscillates with simple harmonic motion of amplitude and spring constant . What is the kinetic energy of the mass when its displacement is…
  13. What happens to the capacitance of a parallel plate capacitor if the area of the plates is doubled and the plate separation is halved?
  14. A stone is thrown horizontally at 15 m/s from the top of a cliff 45 m high. Neglecting air resistance, what is the horizontal distance travelled by the stone before it hits the ground? (…
  15. An electric kettle rated at heats 1 kg of water from to . Assuming zero heat loss, how much time is required? (…
  16. What is the de Broglie wavelength of an electron moving with momentum ? ()
  17. A radioactive isotope has a half-life of 8 days. What fraction of the original sample remains undecayed after 32 days?
  18. In a hydraulic press, the small piston has diameter 2 cm and the large piston has diameter 10 cm. If a force of 50 N is applied to the small piston, what is the force generated on the large piston?

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