NEET 2018 physics questions with solutions

Showing 1–8 of 8 questions

• MCQmediumRotational Motionmoment of inertia and kinetic energy in pure rotation

  Three bodies—a solid sphere A, uniform thin disc B and thin ring C—have equal mass M, radius R and angular speed ω. Compare the work required to bring them to rest.

  Options

  • Option A

    Wᵦ>Wₐ>W꜀

  • Option B

    Wₐ>Wᵦ>W꜀

  • Option C

    W꜀>Wᵦ>Wₐ

  • Option D

    Wₐ>W꜀>Wᵦ

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• MCQeasyRotational Motionangular momentum in pure rotation and its conservation

  A solid sphere rotates freely about its axis in space. Its radius is increased without changing its mass. Which quantity remains constant?

  Options

  • Option A

    rotational kinetic energy

  • Option B

    moment of inertia

  • Option C

    angular velocity

  • Option D

    angular momentum

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• MCQmediumGravitationSatellites, Orbital Motion & Kepler’s Laws

  The kinetic energies of a planet in an elliptical orbit about the Sun at points A, B and C are Kₐ, Kᵦ and K꜀, respectively. AC is the major axis and SB is perpendicular to AC at the Sun S, as shown. Which order is correct?

  

  Options

  • Option A

    Kₐ < Kᵦ < K꜀

  • Option B

    Kₐ > Kᵦ > K꜀

  • Option C

    Kᵦ < Kₐ < K꜀

  • Option D

    Kᵦ > Kₐ > K꜀

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• MCQeasyNewtons law of motion and Frictionnewton second law and problem based on it

  Which statement about friction is INCORRECT?

  Options

  • Option A

    Frictional force opposes relative motion.

  • Option B

    Limiting static friction is directly proportional to normal reaction.

  • Option C

    Rolling friction is smaller than sliding friction.

  • Option D

    Coefficient of sliding friction has dimensions of length.

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• MCQmediumNewtons law of motion and FrictionPseudo force related problem

  A block of mass m rests on a smooth incline of angle θ on a wedge. The wedge accelerates horizontally rightward with acceleration a. What relation makes the block remain at rest relative to the wedge?

  

  Options

  • Option A

    a=g cosθ

  • Option B

    a=g/sinθ

  • Option C

    a=g/cosecθ

  • Option D

    a=g tanθ

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• MCQmediumGravitationGravitation, Gravitational Field & Potential Energy

  If the mass of the Sun were ten times smaller and the universal gravitational constant ten times larger, which statement is NOT correct?

  Options

  • Option A

    Time period of a simple pendulum on Earth would decrease.

  • Option B

    Walking on the ground would become more difficult.

  • Option C

    Raindrops would fall faster.

  • Option D

    Acceleration due to gravity on Earth would not change.

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• MCQmediumCenter of maas , Momentum and Collisioncollision and types of collision

  A block of mass m travelling at speed v strikes a stationary block of mass 4m. The lighter block comes to rest after collision. Determine coefficient of restitution.

  Options

  • Option A

    0.8

  • Option B

    0.25

  • Option C

    0.5

  • Option D

    0.4

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• MCQmediumRotational Motioncombined translatory and rotatory motion ,Pure rolling motion

  A solid sphere rolls without slipping. If Kₜ is its translational kinetic energy and Kᵣ its rotational kinetic energy, find Kₜ:(Kₜ+Kᵣ).

  Options

  • Option A

    10:7

  • Option B

    5:7

  • Option C

    7:10

  • Option D

    2:5

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