NEET UG - Uniform circular motion One Line Questions & Answers

1. A particle is moving in a circle of radius 10 m with a constant speed of 5 m/s. What is its centripetal acceleration? — 2.5 m/s^2

2. If the angular velocity of an object is 2 rad/s and the radius of the circle is 3 m, its linear speed is: — 6 m/s

3. A particle moves in a circle such that its position vector is given by r(t) = (2cos(3t))i + (2sin(3t))j. What is its speed? — 6 m/s

4. A body moves in a circle of radius 0.5 m with a constant angular velocity of 4 rad/s. The centripetal acceleration is: — 16 m/s^2

5. An object completes one revolution in 2 seconds in a circle of radius 5 m. Its speed is: — 5π m/s

6. An object of mass 5 kg moves in a circle of radius 2 m with a speed of 10 m/s. The centripetal force required is: — 250 N

7. What is the centripetal acceleration when an object completes a circle of radius 2m in 1 second? — 8π^2 m/s^2

8. What is the angular speed of the Earth about its own axis? — 2π rad/day

9. Which of the following is an example of uniform circular motion? — The moon revolving around the Earth (approximately)

10. The centripetal acceleration 'a_c' can also be expressed in terms of angular velocity 'ω' and radius 'r' as: — a_c = ω^2r

11. Centripetal force is always directed: — Towards the center

12. The direction of the centripetal acceleration vector is: — Radially inward

13. In uniform circular motion, the speed of the object is: — Constant

14. The angular displacement is defined as the ratio of: — Arc length to radius

15. If an object is moving in a circle with constant speed, its kinetic energy is: — Constant

16. In uniform circular motion, the angular acceleration is: — Constant and zero

17. Which of the following is NOT a characteristic of uniform circular motion? — Constant velocity

18. Which of the following describes uniform circular motion? — Constant speed and changing velocity

19. If the radius of the circular path is doubled while keeping the speed constant, the centripetal acceleration will: — Halve

20. The time period 'T' of an object undergoing uniform circular motion is the time taken to complete: — One full revolution

21. If the speed of an object in uniform circular motion is doubled, keeping the radius constant, the centripetal acceleration will: — Become four times

22. If a particle moves in a circle of radius R with constant angular velocity ω, its linear momentum changes: — In direction but not magnitude

23. If the mass of the object in uniform circular motion increases, while speed and radius remain constant, the centripetal force: — Increases

24. What happens to the time period if the frequency of uniform circular motion is doubled? — It halves

25. Which quantity is conserved in uniform circular motion? — Both kinetic and angular momentum

26. The rate of change of angular velocity is called: — Angular acceleration

27. The unit of angular velocity is: — rad/s

28. Centripetal force is responsible for: — Changing the direction of the velocity of the object

29. The magnitude of centripetal force 'F_c' acting on an object of mass 'm' moving with speed 'v' in a circle of radius 'r' is: — mv^2/r

30. If the radius of the circular path is R and the angular velocity is ω, the magnitude of centripetal force on a particle of mass m is: — mω^2R

31. The direction of the velocity vector in uniform circular motion is always: — Perpendicular to the acceleration

32. In uniform circular motion, the work done by the centripetal force on the object in one complete revolution is: — Zero

33. The centripetal acceleration is proportional to the square of: — Speed

34. The angular displacement 'Δθ' in uniform circular motion is related to the arc length 's' by: — s = rΔθ

35. The centripetal acceleration is inversely proportional to: — Radius

36. Which of the following is a vector quantity in uniform circular motion? — Velocity

37. Which statement is INCORRECT for uniform circular motion? — Velocity is constant.

38. If a particle completes 'n' revolutions in time 't', its frequency is: — n/t

39. The acceleration in uniform circular motion is called: — Centripetal acceleration

40. The acceleration in uniform circular motion is directed towards: — The center of the circle

41. The frequency 'f' of uniform circular motion is defined as: — The reciprocal of the time period

42. What is the direction of the velocity vector in uniform circular motion? —

43. The relationship between speed 'v', radius 'r', and time period 'T' in uniform circular motion is: — v = 2πr/T

44. If an object moves in a circle of radius 'r' with constant angular velocity 'ω', its linear speed 'v' is given by: — v = ωr

45. What is the magnitude of centripetal acceleration for an object moving with speed 'v' in a circle of radius 'r'? — v^2/r

46. Which physical quantity remains constant in uniform circular motion? — Speed

47. A particle moves on a circular path of radius R. If its speed is v, then the angle covered in time Δt is: — vΔt/R

48. The condition for an object to be in uniform circular motion is that its acceleration must be: — Constant and directed towards the center

49. How is the angular velocity 'ω' related to the frequency 'f'? — ω = 2πf

50. If an object moves in a circle of radius r with speed v, the angular speed ω is given by: — ω = v/r

Uniform circular motion - One Line Questions