Class 11 Physics — Chapter 5: Laws of Motion Online Test

1. What formula describes the relationship between power, work, and time?

2. A 2 kg block is initially at rest on a horizontal frictionless surface. If a horizontal force of 10 N is applied to the block, what is its velocity after 4 seconds?

3. A crate of mass 50 kg is pushed along a rough horizontal surface with a force of 200 N. If the coefficient of kinetic friction between the crate and the surface is 0.4, what is the acceleration of the crate?

4. What is an example of non-uniform circular motion?

5. What is the direction of centripetal force?

6. What is the relationship between centripetal force and centripetal acceleration?

7. When a force is applied to an object, what happens to the object's momentum?

8. Which statement correctly compares the magnitudes of static frictional force and kinetic frictional force between two surfaces?

9. What type of frictional force acts between two surfaces that are sliding past each other?

10. In a dynamic equilibrium situation, what happens if the forces acting on an object are not balanced?

11. In which of the following scenarios is an object in rotational equilibrium?

12. In a collision between a truck and a bicycle, which of the following statements is true about the total momentum before and after the collision?

13. When a person jumps off a boat into the water, how does the boat react according to the principle of conservation of linear momentum?

14. When a bird flies by flapping its wings, according to Newton's third law, what is the reaction force to the bird's wing movement?

15. When a person jumps off a boat onto a dock, according to Newton's third law, what is the reaction force to the person's jump?

16. What is the relationship between Newton and pound-force?

17. How did Aristotle's ideas influence Islamic scholars such as Ibn Sina (Avicenna) and Ibn Rushd (Averroes)?

18. According to Newton's first law of motion, what role does inertia play?

19. Why does a book placed on a table remain at rest until someone moves it?

20. Why does a ball thrown inside a moving train follow a curved path to an observer on the ground?

1. For a body to be in translational equilibrium, which condition must be true?

2. In a collision between two cars, how does the impulse experienced by each car compare, assuming they experience the same force and time of impact?

3. Which formula describes the relationship between the force exerted by an ideal gas, its pressure , and volume ?

4. What happens to the static frictional force when an applied force tries to move an object but is less than the maximum static frictional force?

5. A rocket of mass 1000 kg is launched upwards with an acceleration of 20 m/s². What is the force exerted by the rocket's engines?

6. How does an airplane flying at a constant speed relate to inertial frames of reference?

7. Which concept did Descartes introduce to explain motion and the behavior of matter, challenging Aristotle's ideas?

8. When a cannon fires a cannonball, according to Newton's third law, how does the cannon recoil?

9. What is the formula for gravitational force between two masses and separated by a distance ?

10. Which factor does not affect the magnitude of static friction between two surfaces?

11. A hockey puck of mass 0.1 kg is pushed along a frictionless surface with a force of 5 N. What is the acceleration of the puck?

12. At what point does spring force become zero?

13. What concept explains why a tennis ball thrown vertically into the air eventually falls back to the ground?

14. What is the definition of inertia?

15. Which force allows a person to lift a book off a table?

16. When a swimmer pushes against the water with their hands, according to Newton's third law, the water exerts an equal and opposite force ________.

17. What happens if the radius of the circular path decreases in circular motion?

18. How do Newton's laws of motion contribute to engineering and technology?

19. When a person jumps off a stationary boat into the water, according to Newton's third law, how does the boat react?

20. Which unit of mass is commonly used in the context of atomic and molecular scales?

21. What is the formula for elastic potential energy?

22. Which of Newton's laws of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass?

23. Why does a satellite orbiting Earth maintain dynamic equilibrium?

24. Why does a book lying on a table not fall through the table?

25. When a car suddenly stops, the passengers inside the car tend to lurch forward. Which law of motion explains this phenomenon?

26. What happens to spring force if a spring is stretched further from its equilibrium position?

27. What happens to the motion of an object when an applied force is greater than opposing forces like friction?

28. How did Galileo's experiments contribute to the understanding of inertia?

29. What is the formula for the electric field created by a point charge at a distance from it?

30. What is the direction of spring force when a spring is compressed?

1. What is the formula for the force acting on an object with mass undergoing acceleration ?

2. How do physicists use equilibrium principles in analyzing the stability of satellites in orbit?

3. Why does a book lying on a table not fall through the table?

4. Which force is responsible for keeping an object in circular motion?

5. What did Aristotle propose as the cause of the motion of the planets?

6. What term did Galileo use to describe the tendency of objects to resist changes in their motion?

7. According to Aristotle, what is the natural state of motion for objects on Earth?

8. In a rocket launch, when the rocket engine ignites, according to Newton's third law, what is the reaction force?

9. Which of the following best demonstrates inertia in action?

10. What is tension force?

11. Which step involves choosing an appropriate coordinate system in mechanics problem-solving?

12. What is the formula for the gravitational potential energy of an object of mass at height above the Earth's surface?

13. What is the final step in problem-solving in mechanics?

14. What is the formula for the Doppler effect frequency observed when a source emitting frequency moves at velocity towards an observer?

15. When a car collides with a wall, according to Newton's third law, what is the reaction force to the car's impact?

16. Which formula represents the relationship between the electric potential energy of a point charge and the electric potential at a distance from the charge?

17. Which scientist formulated the laws of motion and universal gravitation, further refuting Aristotle's theories on motion and celestial mechanics?

18. What is the relationship between centripetal force and centrifugal force?

19. How did Francis Bacon contribute to the criticism of Aristotle's theories on motion?

20. Why is kinetic frictional force sometimes referred to as sliding friction?

21. According to Newton's first law of motion, what happens to an object in motion when no external forces act upon it?

22. Which formula represents the relationship between the angular velocity , linear velocity , and radius of rotation?

23. Which force allows a person to hear sound waves?

24. What is the formula for the escape velocity required for an object of mass to escape the gravitational pull of a celestial body of mass and radius ?

25. Which of the following is an example of inertia in everyday life?

26. Why are Newton's laws of motion considered classical mechanics?

27. Which physical quantity determines the magnitude of centripetal force in circular motion?

28. What type of frictional force acts between two surfaces that are stationary relative to each other?

29. What property of an object does momentum depend on?

30. Which amusement park ride demonstrates circular motion?

31. Which formula represents the relationship between centripetal force , mass , radius of circular motion , and angular velocity ?

32. What is the formula for the angular frequency of a simple harmonic oscillator with spring constant and mass ?

33. Which Renaissance scientist challenged Aristotle's ideas by proposing the heliocentric model of the universe?

34. A car of mass 1200 kg is moving at a constant velocity of 15 m/s. What is the net force acting on the car?

35. How does an astronaut in a spacecraft experience inertial frames of reference?

36. Which of the following best represents Newton's first law of motion?

37. How does a diver maintain a straight path while diving into water?

38. During a collision between two ice skaters on ice, what remains conserved according to Newton's third law?

39. Which formula describes the relationship between the electric potential at a point in an electric field, the electric field strength , and distance from a point charge ?

40. Which law of motion is crucial in understanding the operation of a catapult?

41. Why is Newton's third law of motion important in the study of collisions?

42. Which of Galileo's works discussed his experiments with inclined planes and the concept of inertia?

43. What happens to the acceleration of an object if the force acting on it is increased while its mass remains constant?

44. What is an applied force?

45. If a ball collides with a wall and bounces back with the same speed, what can be said about the momentum exchange with the wall?

46. Why do astronauts wear thruster packs in space?

47. How did Aristotle's ideas on motion differ from later theories proposed by scientists like Galileo and Newton?

48. What happens to the tension force in a rope if additional mass is added to the rope's lower end?

49. Which formula describes the relationship between the wavelength of a wave, its frequency , and the speed of the wave?

50. Which unit of mass is commonly used alongside the Newton in calculations of force?