Circular and Rotational Motions - MCQ Test Series solved questions for NEET-UG, IIT JEE, COMEDK, MBBS and BDS admission tests, Engineering Entrance Exams

Physics: Circular Motion, Rotational Motion

Physics MCQ Test Series solved questions for NEET-ug, IIT JEE, COMEDK, MBBS and BDS admission tests, Engineering Entrance Exams and other such competitive exams.

Syllabus for NEET and IIT JEE:

Kinematics of Circular Motion; Dynamics of Uniform Circular Motion; Centripetal Force; Examples: vehicle on level circular road, vehicle on baked track; Angular Velocity and is relation with Linear Velocity; Torque or Moment of Force and Angular Momentum; Laws of Conservation of Angular Momentum; Theorems of perpendicular axes and parallel axes; Kinematics of Rotational Motion about a fixed axis; Rolling Motion; General relation among Position-Velocity-Acceleration for Motion in a plane and Uniform Circular Motion; Centrifugal Force; Motion in a vertical circle; Rotational Motion of a rigid body; Moment of Inertia; Angular Impulse.

India Study Solution

Solved MCQ Test Series – Set 3 (Q. No. 21-30)

Question 21: The angular speed of a fly wheel making 120 rev/min is:

a. 2π rad/s

b. 4π² rad/s

c. π rad/s

d. 4π rad/s

Question 22: A child is swinging a swing, minimum and maximum heights of swing from earth’s surface are 0.75 m and 2 m respectively. The maximum velocity of this swing is –

a. 5 m/s

b. 10 m/s

c. 15 m/s

d. 20 m/s

Question 23: An aeroplane is flying with a uniform speed of 100 m/s along a circular path of radius 100 m. The angular speed of the aeroplane will be:

a. 1 rad/s

b. 2 rad/s

c. 3 rad/s

d. 4 rad/s

Question 24: A block of mass m slides down along the surface of the bowl from the rim to the bottom as shown in fig. The velocity of the block at the bottom will be –

Question 25: When a body moves with a constant speed along a circle:

a. Its velocity remains constant

b. No force acts on it

c. No work is done on it

d. No acceleration is produced on it

Question 26: A 1 kg ball is rotated in a vertical circle by using a string of length 0.1 m. If the tension in the string at the lowest point is 29.4 N, its angular velocity at that position is –

a. 7 rads^-1

b. 14 rads^-1

c. 3.5 rads^-1

d. 25.6 rads^-1

Question 27: A cyclist moves in a circular track of radius 100 m. If the coefficient of friction is 0.2. Then the maximum speed with which the cyclist take a turn without leaning inwards is:

a. 14.0 m/s

b. 140 m/s

c. 1.4 m/s

d. 9.8 m/s

Question 28: If all objects on the equator of earth feel weightless then the duration of the day will nearly become –

a. 6.2 hr

b. 4.4 hr

c. 2.2 hr

d. 1.41 hr

Question 29: Two racing cars of masses m₁ and m₂ are moving in circles of radii r₁ and r₂ respectively. Their speeds are such that each makes a complete circle in the same time t. The ratio of the angular speeds of the first to the second car is:

a. 1: 1

b. m₁: m₂

c. r₁: r₂

d. m₁m₂: r₁r₂

Question 30: A 2 kg stone is swung in a vertical circle by attaching it at the end of a string of length 2m. If the string can withstand a tension 140.6 N, the maximum speed with which the stone can be rotated is –

a. 22 ms^-1

b. 44 ms^-1

c. 33 ms^-1

d. 11 ms^-1

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