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 15 of 27
- A. 4 rad
- B. 9 rad
- C. 12 rad
- D. 7 rad
Explanation: Following is the solution to this question;
Correct answer: 9 rad- A. 2 radian
- B. 3 radian
- C. 5 radian
- D. 6.28 radian
Explanation: One complete circle is approximately equal to 6.28 radii and is exactly equal to 2 ℼ radii.
Correct answer: 6.28 radian- A. r(π/3)
- B. r(π/6)
- C. r(π/30)
- D. r(π/180)
Explanation: The dispance through which any point on the rim moves is equal to the the distance the rim has rolled, S.
Correct answer: r(π/6)- A. parameter
- B. area
- C. circumference
- D. all of these
Explanation: As θ= Angular displacement or measurementS= arc length or circumferencer= radius of circle Since θ= S/r Hence angular displacement is…
Correct answer: circumference- A. 5.0 radians
- B. 3.5 radians
- C. 4.5 radians
- D. 5.5 radians
Explanation: Arc length = Radius x Angular displacementS = rθKeeping Arc length as 14m and radius as 4m, we get angular displacement as 3.5 radians.
Correct answer: 3.5 radians- A. 57.1 degrees
- B. 57.2 degrees
- C. 57.3 degrees
- D. 57.4 degrees
Explanation: 360 degrees = 2 π rads-> 1 radian= 360/2π->57.3 °.
Correct answer: 57.3 degrees- A. 180/pi
- B. pi/180
- C. 2pi/ 180
- D. pi/57.3
Explanation: 360 degrees is one complete rotation, which in radians is 2pi (approximately 6.28).To work out the equivalent angular displacement in…
Correct answer: pi/180- A. 5.5 radians
- B. 5.0 radians
- C. 3.5 radians
- D. 4.5 radians
Explanation: The following is the solution:Given that the radius of the circular path is 4m, and the object moves 14m on this path, we can calculate…
Correct answer: 3.5 radians- A. Linear motion
- B. Circular motion
- C. Random motion
- D. Oscillation
Explanation: In circular motion, an object moves along a circular path. If an object completes one full revolution and returns to its starting point…
Correct answer: Circular motion- A. Clockwise
- B. Anti-clockwise
- C. Parallel
- D. Prependicular
Explanation: For positive angular displacement, the rotation would be counterclockwise.
Correct answer: Anti-clockwise- A. π/3r
- B. π/6r
- C. π/30r
- D. π/180r
Explanation: When a wheel of radius r turns through an angle of 30 degrees, the distance any point on its rim moves can be calculated using the formula…
Correct answer: π/6r- A. πr
- B. 2πr
- C. Zero
- D. 4πr
Explanation: When a body completes two full revolutions in a circular path, it means it has moved around the entire circumference of the circle twice.
Correct answer: 4πr- A. π/3r
- B. πr/6
- C. π/30r
- D. π/180r
Explanation: Circumference of the circle is 2πr. According to the formula, Arc length = (angle/360°) x 2πr. The angle is 30°.
Correct answer: πr/6- A. 1:π
- B. π:1
- C. 2:π
- D. π:2
Explanation: Since the diameter of the circle is unknown, we can assume it to be 2r, where 'r' is the radius of the circle.
Correct answer: 1:π- A. 600rad
- B. 300rad
- C. 75rad
- D. 150rad
Explanation: The correct answer is Option D: 150rad.Initial angular speed, ω0 =0 rad/sFinal angular speed, ω=60 rad/sTime taken, t=5sFrom…
Correct answer: 150rad- A. 1 rad
- B. One degree
- C. 1 Revolution
- D. All of these
Explanation: The correct answer is option A: 1 rad. One radian is defined as the angle subtended by an arc of length equal to the radius of the circle.
Correct answer: 1 rad- A. 2
- B. 3
- C. 3/2
- D. 1/2
Explanation: In 3π radians, there are 1.5 revolutions. This is calculated by dividing 3π by 2π, as one revolution is equal to 2π radians.
Correct answer: 3/2- A. πr
- B. 2πr
- C. Zero
- D. 4πr
Explanation: Explanation is given below:When a body completes two full revolutions in a circular path, it means it has moved around the entire…
Correct answer: 4πr- A. Negative
- B. Positive
- C. Null
- D. Zero
Explanation: For anti-clockwise (or counter-clockwise) rotation, the angular displacement is considered positive.
Correct answer: Positive- A. 72°
- B. 80°
- C. 50°
- D. 90°
Explanation: A full circle is 2π radians, which is equal to 360 degrees. Therefore, to convert radians to degrees, you can use the following…
Correct answer: 72°