French Baccalaureat · Physique-Chimie

Mouvement, énergie et ondes

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

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

All 21 questions

  1. According to Newton's second law, what is the relationship between the net force on an object of mass and its acceleration ?
  2. An object falls freely near the Earth's surface with no friction. What is its acceleration, to one decimal place?
  3. A net force of acts on a body of mass . What is its acceleration?
  4. What is the kinetic energy of a car of mass moving at ?
  5. A object descends by . Taking , what is the work done by its weight?
  6. A wave has a frequency of . What is its period?
  7. Sound travels at . What is the wavelength of a sound of frequency ?
  8. A ball is launched horizontally at from a height of (take , no air resistance). How far from the foot of the cliff does it land?
  9. When is the mechanical energy of a system conserved?
  10. A simple pendulum has length (take ). What is its period, using ?
  11. Under which condition is diffraction of a wave most noticeable?
  12. A siren moves toward a still observer. How does the observed frequency compare with the emitted one?
  13. What is the energy of a photon of wavelength ? Use and .
  14. A ray goes from air () into glass () with an incidence angle of . What happens to the ray?
  15. If the distance between two masses is doubled, how does the gravitational force between them change?
  16. A car moves at a constant speed of on a circular path of radius . What is its acceleration?
  17. The sound level in decibels increases by about . What happened to the sound intensity?
  18. The period of a mass-spring oscillator is . What happens to if the mass is multiplied by ?
  19. A cart moving at hits an identical stationary cart and they stick together. What is their common speed?
  20. For a satellite in a circular orbit of radius around the Earth, . How does the orbital speed change when the satellite moves to a higher orbit?
  21. A resistor has a voltage of across it. What current flows through it?

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