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NEET UG Systems of Particles and Rotational Motion — practice questions

Explore 28 free Systems of Particles and Rotational Motion questions in NEET UG Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Systems of Particles and Rotational Motion questions and exercises with answers

Showing questions 1–28 of 28.

No real body is truly rigid because real bodies:Read the answer and worked solution →The rigid body idealisation works because deformations are often:Read the answer and worked solution →The centre of mass moves as if all the mass were concentrated:Read the answer and worked solution →The velocity of the centre of mass equals the total momentum divided by:Read the answer and worked solution →With zero total external force, the total linear momentum stays:Read the answer and worked solution →Moment of force is also referred to as:Read the answer and worked solution →Torque is which kind of physical quantity?Read the answer and worked solution →The symbol used for torque is the Greek letter:Read the answer and worked solution →The dimensions of torque are the same as those of:Read the answer and worked solution →Although its dimensions match work, torque is a quantity that is:Read the answer and worked solution →The SI unit of moment of force is the:Read the answer and worked solution →Reversing both r and F leaves the direction of the torque:Read the answer and worked solution →Translational equilibrium requires the total external force to be:Read the answer and worked solution →Rotational equilibrium requires the total external torque to be:Read the answer and worked solution →The centre of gravity is where the total gravitational torque is:Read the answer and worked solution →In the moment of inertia formula, r is the distance from the axis that is:Read the answer and worked solution →The parallel axes theorem adds to the centre of mass value the mass times:Read the answer and worked solution →Rotation about a fixed axis is directly analogous to:Read the answer and worked solution →The kinetic energy of a rolling body is the sum of translation and:Read the answer and worked solution →The radius of gyration relates the moment of inertia to the body's:Read the answer and worked solution →True or false on rotational motionRead the answer and worked solution →Quick picks on rotational motionRead the answer and worked solution →Match each term to its meaningRead the answer and worked solution →Translational or rotationalRead the answer and worked solution →Torque or workRead the answer and worked solution →Use the parallel axes theoremRead the answer and worked solution →Fill the gaps on rotational motionRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

No real body is truly rigid because real bodies:

  1. Deform
  2. Dissolve
  3. Evaporate
  4. Magnetise
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Correct answer: A. Deform

1. Applied forces change the shape of any actual object. 2. Rigidity is therefore an idealisation. 3. Real bodies deform under the influence of forces. _Source: syllabus Physics Part I, Chapter 7, Systems of Particles and Rotational Motion._

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The rigid body idealisation works because deformations are often:

  1. Periodic
  2. Negligible
  3. Enormous
  4. Reversed
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Correct answer: B. Negligible

1. Wheels, tops and steel beams change shape very little. 2. The small change can be ignored in the analysis. 3. So the deformations are negligible in many situations. _Source: syllabus Physics Part I, Chapter 7, Systems of Particles and Rotational Motion._

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The centre of mass moves as if all the mass were concentrated:

  1. At the edges
  2. At the base
  3. At that point
  4. At the surface
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Correct answer: C. At that point

1. The centre of mass sums up the motion of a whole system. 2. External forces are treated as acting there too. 3. So it moves as if all the mass sat at that point. _Source: syllabus Physics Part I, Chapter 7, Systems of Particles and Rotational Motion._

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