## Rotational Motion-Quiz-6

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 T shaped object with dimension shown in the figure, is lying on a smooth floor. A force F is applied at the point Parallel to AB, such that the object has only the translational motion without rotation. Find the location of P with respect to C.

•  2/3 l
•  3/2 l
•  4/3 l
•  l
Solution

Q2.Three identical blocks A,B and C are placed on horizontal frictionless surface. The blocks A and C are at rest. But A is approaching towards B with a speed 10 ms-1. The coefficient of restitution for all collisions is 0.5. The speed of the block C just after collision is

•  5.6 ms-1
•  6 ms-1
•  8 ms-1
•  10 ms-1
Solution

Q3.  A wheel of mass 8 kg and radius 40 cm is rolling on a horizontal road with angular velocity of 15 rad s-1. The moment of inertia of the wheel about its axis is 0.64 kg m-2. Total KE of wheel is
•  288 J
•  216 J
•  72 J
•  144 J
Solution

Q4. The two bodies of mass m1 and m2 (m1 >m2) respectively are tied to the ends of a massless string, which passes over a light and frictionless pulley. The masses are initially at rest and the released. Then acceleration of the centre of mass of the system is

•  [(m1-m2)/(m1+m2)]2 g
•  [(m1-m2)/(m1+m2)]2
•  g
•  zero
Solution

Q5.Moment of inertia of big drop in I. If 8 droplets are formed from big drop, then moment of inertia of small droplet is
•  I/32
•  I/16
•  I/8
•  I/4
Solution

Q6. A thin wire of mass M and length L is bent to form a circular ring. The moment of inertia about its axis is
•  1/(4Ï€2) ML2
•  1/12 ML2
• 1/3Ï€2ML2
•  1/Ï€2 ML2
Solution

Q7.The moments of inertia of two freely rotating bodies A and B are IA and IB respectively. IA>IB and their angular momenta are equal. If KA and KB are their kinetic energies, then
•  KA=KB
•  KA>KB
•  KA< KB
•  KA=2KB
Solution

Q8.Two homogeneous spheres A and B of masses m and 2m having radii 2a and a respectively are placed in touch. The distance of centre of mass from first sphere is
•  a
•  2a
•  3a
•  None of these
Solution

Q9.A force of- F k ̂ acts on O, the origin of the coordinate system. The torque about the point (1, -1) is

•  F(i - j )
•  -F(i + j)
•  F(i +j )
•  -F(i - j )
Solution

Q10. The distance between the centres of carbon and oxygen atoms in the carbon monoxide molecule is 1.130 â„«. Locate the centre of mass of the molecule relative to the carbon atom
•  5.428 â„«
•  1.130 â„«
•  0.6457 â„«
• 0.3260â„«
Solution

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