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 19 of 27
- A. Apparent
- B. Dispersing
- C. Unsolved
- D. Teeming
Explanation: Baffling means something impossible to understand or perplexing, and is thus synonymous to unsolved.
Correct answer: Unsolved- A. Only conclusion I follows.
- B. Only conclusion II follows.
- C. Neither conclusion I nor conclusion II follows.
- D. Both conclusion I and conclusion II follow.
- E. Either conclusion I or conclusion II follows.
Explanation: The correct answer is that only conclusion I follows. The statement 'Nutritious food is delicious and good for health' implies that any…
Correct answer: Only conclusion I follows.- A. 61
- B. 64
- C. 72
- D. 70
- E. None of these
Explanation: The sequence is generated by multiplying pairs of consecutive integers: 1*2 = 2, 2*3 = 6, 3*4 = 12, 4*5 = 20, 5*6 = 30, 6*7 = 42, 7*8 =…
Correct answer: 72- A. Statement I is the cause and statement II is its effect
- B. Statement II is the cause and statement I is its effect
- C. Both the statement I and II are independent causes
- D. Both the statement I and II are effects of independent causes
Explanation: Significant discounts (Statement II) provide a strong financial incentive for consumers.
Correct answer: Statement II is the cause and statement I is its effect- A. Only I follows
- B. Only II follows
- C. Either I or II follows
- D. Both I and II follow
Explanation: This problem requires a two-pronged approach. The government has a responsibility to provide a safe water supply (Action I), which is a…
Correct answer: Both I and II follow- A. 170
- B. 160
- C. 360
- D. 420
Explanation: The ratio of diameters is 30:20=3:2.The circumferences are also in the same ratio of diameters.The first wheel travels the distance in 240…
Correct answer: 360- A. Away
- B. Towards
- C. Normally
- D. Tangentially
Explanation: Centripetal acceleration and centripetal force both act towards the centre of the circular path. Hence, Option B is correct.
Correct answer: Towards- A. 0
- B. 90
- C. 60
- D. None of these options are correct
Explanation: Linear acceleration will be maximum if the angle between a and the position vector r is 90°. Hence, Option B is correct.
Correct answer: 90- A. Front wheels
- B. Rear wheels
- C. Outer wheels
- D. Inner wheels
Explanation: The maximum force will be applied on the outer wheels.
Correct answer: Outer wheels- A. Same
- B. Double
- C. 4 times
- D. 8 times
Explanation: If both the speed of a body and radius of its circular path are doubled, then centripetal force also gets doubled.
Correct answer: Double- A. ω= rv
- B. v= rω
- C. ω= v/r2
- D. v= ω/r
Explanation: Relation Between Linear Velocity and Angular Velocity |v| = rω, which is the relation between linear and angular velocity.
Correct answer: v= rω- A. Towards center
- B. Along tangent
- C. Along the directicn of motion
- D. Opposite of the direetlon of motion
Explanation: The direction of the instantaneous velocity is shown at two points along the path.
Correct answer: Towards center- A. ac = v / r
- B. ac = v2 / r
- C. ac = v r
- D. ac = v2 r
Explanation: The instantaneous acceleration (a) in the case of centripetal force can be calculated using the formula a = v2 / r, where: "a" is the…
Correct answer: ac = v2 / r- A. Fc = mω2
- B. Fc = mrω
- C. Fc = mrω2
- D. Fc = mr2ω
Explanation: The formula for centripetal acceleration is Fc=mrω², hence, Option C is correct.
Correct answer: Fc = mrω2- A. Hoop
- B. Disc
- C. Sphere
- D. All at the same time
Explanation: If a hoop, a sphere and a disc are rolling down from an inclined plane simultaneously, the sphere will reach the bottom first.
Correct answer: Sphere- A. Equal
- B. Inversely related
- C. Directly related
- D. No relation
Explanation: When an object undergoes constant linear acceleration, it experiences a change in velocity over time.
Correct answer: Inversely related- A. Zero
- B. Negative
- C. Unity
- D. They can never be equal
Explanation: When the radius (r) becomes equal to 1, the angular velocity (ω) and linear velocity (v) become equal.
Correct answer: Unity- A. v = r x w
- B. v = w x r
- C. w=v x r
- D. r = v x w
Explanation: The relationship between linear velocity and angular velocity can be described using the following equation:v = ω x r
Correct answer: v = w x r- A. Zero
- B. Doubled
- C. Very large
- D. None of these
Explanation: The angular acceleration becomes infinite when r approaches zero (r → 0).The angular acceleration (α) is defined as the rate of change of…
Correct answer: Zero- A. 31.6 cm/s
- B. 301.6 cm/s
- C. 30.6 cm/s
- D. 3016 cm/s
Explanation: v = r w = (8)(12 )r (w=12r, r is radius which is equal to 𝝅)= 8cm x 12𝝅= 8 x 37.68 = 301.44 cm/s (nearest answer would be 301.6 cm/s)
Correct answer: 301.6 cm/s