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 12 of 27
- A. Linear velocity
- B. Centripetal force
- C. Acceleration
- D. Speed
Explanation: The correct answer is option D: Speed. In uniform circular motion, the factor that remains constant is the object's speed, which is the…
Correct answer: Speed- A. π2
- B. 8π2
- C. 4π2
- D. Zero
Explanation: The correct answer is option C: 4π². The radial acceleration can be calculated by converting the number of revolutions per second to…
Correct answer: 4π2- A. Half
- B. Same
- C. Double
- D. Four times
Explanation: The correct answer is option C: Double. When the radius of a rotating body is doubled, the centripetal force becomes double, as shown by…
Correct answer: Double- A. Its velocity is constant
- B. Its acceleration is constant
- C. Its motion is linear
- D. Its motion is circular
Explanation: The correct answer is option D: Its motion is circular. This option suggests that the particle's motion is circular.
Correct answer: Its motion is circular- A. 8rad/s
- B. 4rad/s
- C. 12rad/s
- D. 2rad/s
Explanation: Option A correctly calculates the angular velocity of the wheel using the given linear velocity and radius.𝑣=1600 cm/s=16…
Correct answer: 8rad/s- A. Particle 1
- B. Particle 2
- C. Particle 3
- D. Particle 4
Explanation: Particle-2 has a mass of m/2, speed of 2v, and a radius of 2r. Evaluating the centripetal force: Fc = (m/2 * (2v)2) / (2r) = (4mv2)/(4r) =…
Correct answer: Particle 2- A. 4a
- B. 8a
- C. 16a
- D. a
Explanation: The correct answer is option C: 16a. This option suggests that the new acceleration will become 16a.
Correct answer: 16a- A. 5I
- B. 3I
- C. 6I
- D. 4I
Explanation: This is the following solution:The correct formula for the moment of inertia of a uniform circular disc about an axis perpendicular to its…
Correct answer: 6I- A. 3.14 m
- B. 6.28 m
- C. Pi rad
- D. 0.157 m
Explanation: The following is the solution: S=rθ 1×π=3.14(1) =3.14m
Correct answer: 3.14 m230. When a body moves in a circle, the angle between its linear velocity and angular velocity is always:
- A. 0°
- B. 180°
- C. 360°
- D. 90°
Explanation: This is the correct answer. When a body moves in a circle, the angle between its linear velocity and angular velocity is always 90°.
Correct answer: 90°- A. Is centripetal acceleration
- B. Is tangental acceleration
- C. Is radial acceleration
- D. Both A and B
Explanation: Explanation is given below: In uniform circular motion, the relationship between acceleration (a), radius (r), and angular acceleration…
Correct answer: Is tangental acceleration- A. Toward the centre of circle
- B. Away from centre of circle
- C. Along the tangent
- D. All of these
Explanation: Option C is correct.If the string breaks, the stone will move in a straight line tangent to the circle that it was rotating in.
Correct answer: Along the tangent- A. Quadrupled
- B. Halved
- C. Unchanged
- D. Doubled
Explanation: Option A is correct.If a cyclist turns around a curve at double the speed, the tendency to overturn is quadrupled.
Correct answer: Quadrupled- A. π/3×r
- B. π/6×r
- C. π/30×r
- D. π/180×r
Explanation: Arc length = Distance moved by point= 30/360 *2 πr = 1/6 πr
Correct answer: π/6×r- A. A
- B. B
- C. C
- D. D
Explanation: F=mw^2rAs both points are on same ring they will have same m and w.So,o f is proportional to rF1/F2=R1/R2 .
Correct answer: B- A. 14m/s
- B. 3m/s
- C. 3.92m/s
- D. 5m/s
Explanation: The explanation for this question is below:
Correct answer: 14m/s- A. The centripetal acceleration remains unchanged
- B. The centripetal acceleration is halved
- C. The centripetal acceleration is doubled
- D. The centripetal acceleration is quadrupled
Explanation: The explanation for this question will be added soon!
Correct answer: The centripetal acceleration remains unchanged- A. 3.14m
- B. 3.14rad
- C. 5m
- D. 2.8m
Explanation: The explanation for this question will be added soon!
Correct answer: 3.14m- A. The velocity vector is tangent to the circle
- B. The acceleration vector is tangent to the circle
- C. The acceleration vector points to the center of the circle
- D. The velocity and acceleration vectors are prependicular to each other
Explanation: The explanation for this question will be added soon!
Correct answer: The acceleration vector is tangent to the circle- A. 1.5ms1
- B. 3.5ms1
- C. 4.5ms1
- D. 2.5ms1
Explanation: The correct option is 2.5ms_1 To calculate the linear speed of the wheel, we can use the following formula: v = ωr where: v is the linear…
Correct answer: 2.5ms1