Free Rotational and Circular Motion MCQs with Answers
521 Rotational and Circular Motion MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Angular displacement and angular velocity describe rotation, with angles measured in radians and related to time through angular speed. The connection between angular and linear quantities includes arc length, tangential speed and centripetal acceleration, so circular motion is not confused with motion at constant velocity.
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Read the Rotational and Circular Motion notesFree MDCAT chapter notes with key terms521 questions · page 13 of 27
- A. Radial velocity and radial acceleration
- B. Tangential velocity and radial acceleration
- C. Tangential velocity and tangential acceleration
- D. Tangential velocity but acceleration having both components
Explanation: Option D is most appropriate as when the body moves in a circular path it always possesses tangential velocity and radial acceleration but…
Correct answer: Tangential velocity but acceleration having both components- A. Mass of body
- B. Tension in the string
- C. Velocity of body
- D. Centripetal acceleration
Explanation: Therefore, the correct answer is option B: Tension in the string. The centripetal force required to keep the body moving in a horizontal…
Correct answer: Tension in the string- A. Gravitional force
- B. Frictional force
- C. Centripetal force
- D. Centrifugal acceleration
Explanation: Therefore, the correct answer is option C: Centripetal force. The curved flight of fighter planes at high speed requires a large…
Correct answer: Centripetal force- A. A
- B. B
- C. C
- D. D
Explanation: The ratio can be calculated as: Fc(1)=mv^2/r1 and Fc(2)=mv^r/r2 Divide Fc(1) by Fc(2): Fc(1)/Fc(2)=(mv^2/r1)/(mv^2/r2) = r2/r1 So option A…
Correct answer: A- A. π2
- B. 8π2
- C. 4π2
- D. Zero
Explanation: Therefore, the correct answer is option C: 4π^2. The radial acceleration of the particle is approximately 4π^2 m/s² as : The angular…
Correct answer: 4π2- A. Radial acceleration only
- B. Tangential acceleration only
- C. Both radial and tangential acceleration
- D. Neither radial nor tangential acceleration
Explanation: Therefore, the correct answer is option C: Both radial and tangential acceleration.
Correct answer: Both radial and tangential acceleration- A. Half
- B. Same
- C. Double
- D. Four times
Explanation: Therefore, the correct answer is option C: Double. The centripetal force becomes double when the radius is doubled while keeping the…
Correct answer: Double- A. Speed
- B. Mass
- C. Direction
- D. Kinetic energy
Explanation: Therefore, the correct answer is option C: Direction. When a body performs uniform circular motion, the direction of its velocity…
Correct answer: Direction- A. same
- B. double
- C. tripled
- D. quadrupled
Explanation: Here is the explanation of the correct optionF =mv2/r V/ =2vF/ = F/ = F/ = 4F
Correct answer: quadrupled- A. Centrifugal acceleration
- B. Centripetal acceleration
- C. Tangential acceleration
- D. angular acceleration
Explanation: The acceleration directed toward the center of a circular path, required to keep an object moving in that path.
Correct answer: Centripetal acceleration- A. 0o
- B. 180°
- C. 360°
- D. 90°
Explanation: Please note that the correct option is a) 0 degrees. When the angular acceleration (α) is 0 degrees, the object is not undergoing any…
Correct answer: 0o- A. Fc
- B. 2Fc
- C. Fc/2
- D. 4Fc
Explanation: Option B is correct.We know that:Fc= mv2/rFc=m(2v)2/2r =4/2(mv2/r) =2Fc
Correct answer: 2Fc- A. They act on the same body
- B. Both perform work
- C. Their directions are opposite
- D. All of these
Explanation: Option B is correct.No, the centripetal and centrifugal forces do not both perform work.Centripetal force is the force that keeps an…
Correct answer: Both perform work- A. (i) and (ii) only
- B. (ii) and (iii) only
- C. (i) and (iii) only
- D. (i), (ii) and (iii)
Explanation: Option C is correct.We know that:Fc=mv2/r =2m(2v)2/r = 8(mv2/r) =8FcIf we increase or decrease the radius r then Fc cannot be 8 times.
Correct answer: (i) and (iii) only- A. 0o
- B. 90o
- C. 180°
- D. 60°
Explanation: Option B is correct.The angle between the centripetal force and tangential velocity is always 90 degrees tangential to the circle.
Correct answer: 90o- A. Towards
- B. Away
- C. At
- D. Perpendicular to the plane
Explanation: Centrifugal force is equal in magnitude and opposite to the centripetal force. So, it is away from the center of circle.
Correct answer: Away- A. It has constant radial and tangential acceleration
- B. It has variable tangential and radial accelerations
- C. It only has constant radial acceleration
- D. It only has constant tangential acceleration
Explanation: In a vertical circular motion, such as a particle on a string or a roller coaster loop, both radial and tangential accelerations vary.
Correct answer: It has variable tangential and radial accelerations- A. Along the circumference of the circle.
- B. Along the direction of motion of the object.
- C. Towards the centre of the circle along the radius.
- D. Away from the centre of the circle along the radius.
Explanation: In uniform circular motion, the speed of the object remains constant, but its direction changes continuously, which means there is an…
Correct answer: Towards the centre of the circle along the radius.- A. Ice-skating.
- B. Gymnastics.
- C. Horse riding.
- D. Board diving.
Explanation: The correct answer isHorse riding.In horse riding, the primary focus is on the rider's balance, posture, and control over the horse…
Correct answer: Horse riding.- A. 0.5 J
- B. 2 J
- C. 4 J
- D. 8 J
Explanation: The rotational kinetic energy is calculated using the formula KE = 0.5 * I * ω².
Correct answer: 2 J