Rotational-Motion-Quiz-2

Rotational Motion Quiz-2

Dear Readers,

As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background. 

Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced. 

Q1. A motor is rotating at a constant angular velocity of 600 rpm. The angular displacement per second is

•  3/50π rad
•  3π/50 rad
•  25π/3 rad
•  50π/3 rad

Solution

Q2.A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (In radian) of

•  6
•  10
•  12
•  4

Solution

Q3.  A disc is rolling on the inclined plane, what is the ration of its rotational KE to the total KE?

•  1:3
•  3:1
•  1:2
•  2:1

Solution

Q4. The moment of inertia about an axis of a body which is rotating with angular velocity 1rads^-1 is numerically equal to

•  One-fourth of its rotational kinetic energy
•  Half of the rotational kinetic energy
•  rotational kinetic energy
•  Twice the rotational kinetic energy

Solution

Q5.What is the moment of inertia of solid sphere of density ρ and radius R about its diameter?

•  105/176 R⁵ρ
•  105/176 R² ρ
•  176/105 R⁵ ρ
•  176/105 R² ρ

Solution

Q6. If 'I' is the moment of inertia of a body and 'ω' is its angular velocity, then its rotational kinetic energy is

•  1/2×Iω
•  1/2×I²ω
• 1/2×Iω²
•  1/2×I²ω²

Solution
(C)

Q7.A rigid body of mass m rotates with the angular velocity ω about an axis at a distance 'a' from the centre of mass G. The radius of gyration about G is K. Then kinetic energy of rotation of the body about new parallel axis is

•  1/2 mK² ω²
•  1/2 ma² ω²
•  1/2 m(a²+K²)ω²
•  1/2 m(a+K²)ω²

Solution

Q8.Three rods each of length L and mass M are placed along X,Y and Z axes in such a way that one end of each rod is at the origin. The moment of inertia of the system about Z-axis is

•  (ML²)/3
•  2(ML²)/3
•  3(ML²)/2
•  2(ML²)/12

Solution

Q9.Two masses of 200 g and 300 g are attached to the 20 cm and 70 cm marks of a light metre rod respectively. The moment of inertia of the system about an axis passing through 50 cm mark is

•  0.15 kg m²
•  0.03 kg m²
•  0.3 kg m²
•  Zero

Solution

Q10. Three identical rods, each of length x, are joined to form a rigid equilateral triangle. Its radius of gyration about an axis passing through a corner and perpendicular to the triangle is

•  x/√3
•  x/2
•  √(3/2) x
• x/√2

Solution