Quiz  /  Uniform Circular Motion Class 10 MCQ Questions With Answers

  • 1. 
    Earth revolves around the sun, centripetal force required is provided by:

  • Frictional force
  • Gravitational force
  • Coulomb’s force
  • Magnetic force

  • 2. 
    The radius of earth in meters is:

  • 6.38×106
  • 6.38×1024
  • 6.0×106
  • 6.0×1024

  • 3. 
    For an object moving in a straight line with decrease in velocity, the angle between velocity and acceleration is:

  • 0o
  • 45o
  • 90o
  • 180o

  • 4. 
    For an object moving in circular path, the angle between velocity and acceleration is:

  • 0o
  • 45o
  • 90o
  • 180o

  • 5. 
    The value of “G” was determined experimentally by:

  • Newton
  • Coulomb
  • Cavendish
  • Faraday

  • 6. 
    The mass of earth in kilograms is:

  • 6.38×106
  • 6.38×1024
  • 6.0×106
  • 6.0×1024

  • 7. 
    The gravitational force between two bodies depends upon the product of their masses in addition to:

  • Square of the distance between them
  • Shape of bodies
  • Medium between them
  • Sum of masses

  • 8. 
    A pilot experiences centripetal acceleration of 2g's while maneuvering a loop at a speed of 400 m/s. What is the radius of the loop? (1g =9.8 m/s2)

  • 203 m
  • 8163 m
  • 80,003 m
  • 23 m

  • 9. 
    What is the most direct cause of a car's centripetal acceleration as it rounds a curve?

  • The force of the steering wheel
  • The weight of the car.
  • The normal force exerted by the road.
  • The friction between the tires and the road.

  • 10. 
    The velocity is always _____ to the line of a circle.

  • outwards
  • towards the center
  • tangent
  • faster

  • 11. 
    Which of the following depict the speed/velocity of the moving ball?

  • A
  • B
  • C
  • D

  • 12. 
    A particle P is moving in a circle with uniform speed. Which one of the following diagrams correctly shows the direction of the acceleration a and velocity v of the particle at one instant of time?

  • A
  • B
  • C
  • D

  • 13. 
    An object moves in a circular path at a constant speed. Compare the direction of the object's velocity and acceleration vectors. A) Both vectors point in the same direction. B) The vectors point in opposite directions. C) The vectors are perpendicular. D) The question is meaningless, since the acceleration is zero

  • A
  • B
  • C
  • D

  • 14. 
    Suppose the speed of the car is 11.1 m/s and the radius of curvature (r) is 25 m; determine the magnitude of the centripetal acceleration.

  • 5 m/s/s
  • 0.2 m/s/s
  • 15.8 m/s/s
  • 11 m/s/s

  • 15. 
    What force keeps an object moving in a circle?

  • centripetal force (inward)
  • centrifugal force (outward)

  • 16. 
    Calculate the velocity of an object moved around a circle with a radius of 1.65 m and an acceleration of 3.5 m/s2.

  • 2.4 m/s
  • 3.6 m/s
  • 3.9 m/s
  • 4.2 m/s

  • 17. 
    When an object experiences uniform circular motion, the direction of the acceleration is A) in the same direction as the velocity vector. B) in the opposite direction of the velocity vector. C) is directed toward the center of the circular path. D) is directed away from the center of the circular path.

  • A
  • B
  • C
  • D

  • 18. 
    Two masses m and M are separated by a distance d. If the distance between the masses is increased to 3d, how does the gravitational force between them change?

  • becomes 1/3 as great
  • 1/9 as great
  • 3x greater
  • 9x greater

  • 19. 
    What happens if you let go of the string when you spin the stopper around your head?

  • the stopper continues moving in a circle
  • the stopper moves in a straight line

  • 20. 
    Two bugs ride a turntable which is rotating at a constant rate of 4 rad/s. Bug A is at a radius of 4 cm, while bug B is at a radius of 8 cm. Which of the following is true?

  • Bug A has a greater angular velocity
  • Bug B has a greater angular velocity.
  • Bug A has a greater linear velocity.
  • Bug B has a greater linear velocity.

  • 21. 
    An object moves with a constant speed of 30 m/s on a circular track of radius 150 m. What is the magnitude of the acceleration of the object? A) zero B) 0.17 m/s2 C) 5.0 m/s2 D) 6.0 m/s2

  • A
  • B
  • C
  • D

  • 22. 
    How many radians does a circle have?

  • 360 degrees
  • 2π radians
  • π radians
  • 2 radians

  • 23. 
    The motion of the Moon around the Earth is an example of ____________.

  • uniform action
  • projectile motion
  • rectilinear motion
  • circular motion

  • 24. 
    The wheels of a car have radius 0.330 m. and are rotating at 600.0 rpm. Determine the speed of the car in miles/hour to the nearest tenth. (Determine ω (angular velocity) first and then use v=ω⋅r and convert to km/hour)

  • 11.88 km/hour
  • 685.4 km/hour
  • 74.64 km/hour
  • 74640 km/hour

  • 25. 
    Determine the linear velocity of the tips of the blades for a ceiling fan with 2.000 m blades rotating at 45.00 rpm. (give in SI Units)

  • 565.5 m/s
  • 180 m/s
  • 282.7 m/s
  • 90 m/s

  • 26. 
    Which represents the acceleration of the ball?

  • A
  • B
  • C
  • D

  • 27. 
    Which of the following is a unit of acceleration?

  • m/s
  • m/s2
  • m.s2
  • m/s.s

  • 28. 
    What can be said of an object in uniform circular motion?

  • It has a constant velocity.
  • It is an example of Newton's First Law in the absence of a force.
  • It has a constant tangential speed.
  • none of the choices given

  • 29. 
    A 0.50-kg mass is attached to the end of a 1.0-m string. The system is whirled in a horizontal circular path. If the maximum tension that the string can withstand is 350 N. What is the maximum speed of the mass if the string is not to break? A) 700 m/s B) 26 m/s C) 19 m/s D) 13 m/s

  • A
  • B
  • C
  • D
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