▎Circular Motion Multiple Choice Questions
1. What is the acceleration of an object moving in a circular path at constant speed called?
a) Linear acceleration
b) Centripetal acceleration
c) Tangential acceleration
d) Gravitational acceleration
2. Which of the following quantities remains constant for an object in uniform circular motion?
a) Speed
b) Velocity
c) Acceleration
d) Force
3. The centripetal force required to keep an object moving in a circle is directed:
a) Tangential to the circle
b) Radially inward
c) Radially outward
d) In the direction of velocity
4. If the radius of a circular path is doubled, what happens to the centripetal acceleration if the speed remains constant?
a) It doubles
b) It halves
c) It remains the same
d) It quadruples
5. The period of an object in circular motion is defined as:
a) The distance traveled in one complete revolution
b) The time taken for one complete revolution
c) The speed of the object
d) The radius of the circular path
6. What is the formula for centripetal acceleration?
a) a_c = v²/r
b) a_c = r/v²
c) a_c = r²/v
d) a_c = v/r²
7. Which of the following factors does NOT affect the centripetal force acting on an object in circular motion?
a) Mass of the object
b) Speed of the object
c) Radius of the circular path
d) Color of the object
8. An object moving in a circle at constant speed has:
a) Zero acceleration
b) Constant velocity
c) Constant speed and changing velocity
d) Constant force
9. The gravitational force providing centripetal force for planets orbiting the sun is an example of:
a) Frictional force
b) Normal force
c) Tension force
d) Gravitational force
10. If an object moves with a linear speed of 10 m/s in a circle of radius 5 m, what is its centripetal acceleration?
a) 2 m/s²
b) 10 m/s²
c) 20 m/s²
d) 5 m/s²
11. Which of the following statements about centrifugal force is true?
a) It is a real force acting on objects in circular motion.
b) It is felt as an outward force but is not an actual force.
c) It acts toward the center of the circular path.
d) It increases with increasing mass only.
12. For an object in uniform circular motion, the net force acting on it is:
a) Zero
b) Equal to its weight
c) Directed toward the center of the circle
d) Directed tangentially to the circle
13. What happens to the centripetal force if the speed of an object in circular motion is tripled while keeping the radius constant?
a) It triples
b) It increases nine times
c) It remains constant
d) It decreases
14. The angular velocity (ω) of an object in circular motion is defined as:
a) The angle covered per unit time
b) The linear speed divided by radius
c) The radius divided by linear speed
d) The time taken for one complete revolution
15. What is the relationship between linear velocity (v), radius (r), and angular velocity (ω)?
a) v = r ⋅ ω
b) v = ω ⋅ r²
c) v = r/ω
d) v = ω² ⋅ r
16. In uniform circular motion, which quantity changes direction but not magnitude?
a) Velocity
b) Speed
c) Centripetal acceleration
d) All of the above
17. A car moves around a circular track with a radius of 100 m at a constant speed of 20 m/s. What is its centripetal acceleration?
a) 2 m/s²
b) 4 m/s²
c) 8 m/s²
d) 10 m/s²
18. What type of energy does an object have while moving in circular motion at constant speed?
a) Kinetic energy only
b) Potential energy only
c) Both kinetic and potential energy
d) Neither kinetic nor potential energy
19. Which of these scenarios demonstrates circular motion?
a) A car driving straight on a highway
b) A satellite orbiting Earth
c) A ball thrown upward
d) A train moving on straight tracks