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 18 of 27
- A. 6 rads
- B. π/6 5rads2
- C. 6/π rads2
- D. π rads2
Explanation: The correct answer is Option C:The following is the solution:We can use the equation of motion in angular form, 2as = ω₂² - ω₁², where s…
Correct answer: 6/π rads2- A. 3π rads2
- B. 6π rads-2
- C. 9π rads2
- D. 12π rads2
Explanation: The angular acceleration of the flywheel is calculated by converting the given angular velocity from rpm to radians/second and then using…
Correct answer: 3π rads2- A. 2π rad/s
- B. 4π rad/s
- C. 4π 2rad/s
- D. π rad/s
Explanation: The following is the solution:To find the angular speed of the flywheel, we need to convert the given value from revolutions per minute…
Correct answer: 4π rad/s- A. 2π
- B. 4π
- C. π/6
- D. π/12
Explanation: The following is the solution:To calculate the angular speed of the Earth's daily rotation in radians per hour, we need to know the time…
Correct answer: π/12- A. 2π/60 rads-1
- B. π/24 rads-1
- C. 2π/3600 rads-1
- D. π/3600 rads-1
Explanation: The minute hand of a clock completes a full revolution (2π radians) in one hour, which is 3600 seconds.
Correct answer: 2π/3600 rads-1- A. 3600:1
- B. 60:1
- C. 24:1
- D. 12:1
Explanation: The clock displays 12 divisions, which are 1 hour each for the hour hand and 5 minutes each for the minute hand.
Correct answer: 12:1- A. Constant linear velocity
- B. Constant acceleration
- C. Constant angular velocity
- D. Constant force
Explanation: The answer is constant angular velocity. A motorcyclist going round in a circular track at constant speed has constant angular velocity.
Correct answer: Constant angular velocity- A. Slower
- B. Faster
- C. Constant
- D. Both 'A' and 'C'
Explanation: Option B is correct because as the body moves faster in a circular path, its angular velocity increases and it gains angular acceleration…
Correct answer: Faster349. rev/min is equal to:
- A. π/6 rad s⁻¹
- B. π/15 rad s⁻¹
- C. π/20 rad s⁻¹
- D. π/30 rad s⁻¹
Explanation: Option D is the correct option. The answer can be calculated as:1rev=2π1min=60srev/min=2π /60s=π /30Options A, B, and C do not consider…
Correct answer: π/30 rad s⁻¹- A. T=2π/ω
- B. T=2πω
- C. T=ω/2π
- D. T=πω/2
Explanation: The correct answer is option A: T = 2π/ω. The period of circular motion is given by T = 2π/ω, where T represents the period and ω…
Correct answer: T=2π/ω- A. 3000π
- B. 50π
- C. 100π
- D. 2π
Explanation: To solve this question, we first convert the rotational speed of 3000rpm to angular velocity in radians per second, which is 100π radians…
Correct answer: 100π- A. 20/π rad s
- B. 10/π rad s
- C. 5/π rad s
- D. π rad s
Explanation: The particle completes one full revolution (360 degrees or 2π radians) every 2 seconds, resulting in an angular speed of π radians per…
Correct answer: π rad s- A. 2π/60rads-1
- B. π/24rads-1
- C. 2π/3600rads-1
- D. π/3600rads-1
Explanation: The following is the solution: Time is taken by minute hand to rotate by 2π radians t=1 hr =3600 s ∴ Its angular velocity w= θ/t =2π/3600
Correct answer: 2π/3600rads-1- A. 3600:1
- B. 60:1
- C. 24:1
- D. 12:1
Explanation: It is correct.ratio= minute hand/hour hand= 12*3600/3600 = 12:1
Correct answer: 12:1- A. v2/r
- B. vr
- C. v/r
- D. r/v
Explanation: The explanation is as follows As v=rω ω = v / rwhere: ω is the angular velocity in radians per second (rad/s) v is the linear velocity in…
Correct answer: v/r356. rev/min is equal to:
- A. A
- B. B
- C. C
- D. D
Explanation: Option D is the correct option. the answer can be calculated as: 1rev=2π 1min=60s rev/min=2π /60s =π /30
Correct answer: D- A. y=2π/ω
- B. y=2πω
- C. y=ω/2π
- D. y=πω/2
Explanation: Therefore, the correct answer is option A: y = 2π/ω. The period of circular motion is given by T = 2π/ω, where T represents the period and…
Correct answer: y=2π/ω- A. Head to tail rule
- B. Kirchhoff rule
- C. Left hand rule
- D. Right hand rule
Explanation: The right-hand rule is another mnemonic used to determine the relationships between current, magnetic fields, and induced currents.
Correct answer: Right hand rule- A. rω2
- B. Constant
- C. Zero
- D. rω
Explanation: Explanation is given below. If a body moves with constant angular velocity on a circle, then its angular acceleration is zero.
Correct answer: Zero- A. Minimum.
- B. Maximum.
- C. Less than the mass of the stone.
- D. Equal to the weight of the stone.
Explanation: At the highest position, the tension in the string is T=mv2/r-mgIt is minimum at the top of the circle, and can be zero if the speed is…
Correct answer: Minimum.