NEET 2021 physics questions with solutions

Showing 1–10 of 20 questions

• MCQeasyCircular Motionkinematics of circular motion

  A particle moves in the x-y plane according to x = a sin(ωt) and y = a cos(ωt). The particle follows:

  Options

  • Option A

    an elliptical path

  • Option B

    a circular path

  • Option C

    a parabolic path

  • Option D

    a straight line inclined equally to x and y axes

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• MCQeasyRotational Motionmoment of inertia and kinetic energy in pure rotation

  A 90° arc is removed from a thin circular ring of mass M and radius R. If the moment of inertia of the remainder about the central perpendicular axis is KMR², find K.

  Options

  • Option A

    $\frac{3}{4}$

  • Option B

    7/8

  • Option C

    1/4

  • Option D

    1/8

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• MCQmediumGravitationAcceleration Due to Gravity & Escape Velocity

  A particle of mass m is projected vertically upwards from Earth’s surface with speed u. Earth has mass M and radius R. What is the minimum speed needed so the particle never returns?

  Options

  • Option A

    √(2GM/R)

  • Option B

    √(2GM/R²)

  • Option C

    √(2gR²)

  • Option D

    √(GM/R²)

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• MCQeasyKinematics part-2 Projectile MotionMotion in 2-D and ground to ground projectile

  The speed of a projectile at its maximum height is half of its initial speed. The angle of projection is:

  Options

  • Option A

    60°

  • Option B

    15°

  • Option C

    30°

  • Option D

    45°

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• MCQmediumRotational Motiontorque and rotational equilibrium

  A uniform 200 cm, 500 g rod is balanced on a wedge at its 40 cm mark. Mass 2 kg hangs at 20 cm and mass m hangs at 160 cm as shown. Find m (g=10 m/s²).

  

  Options

  • Option A

    1/2 kg

  • Option B

    1/3 kg

  • Option C

    1/6 kg

  • Option D

    1/12 kg

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• MCQmediumWork , Power and Energyconservation of mechanical energy

  A particle is released from height S above Earth's surface. At some height h its kinetic energy equals three times its gravitational potential energy (zero at ground). Find h and speed v.

  Options

  • Option A

    S/4 and (3gS)/2

  • Option B

    S/4 and √(3gS/2)

  • Option C

    S/2 and √(3gS/2)

  • Option D

    S/4 and √(gS/2)

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• MCQmediumKinematics part-2 Projectile MotionMotion in 2-D and ground to ground projectile

  A particle moving in a circle of radius R with uniform speed takes time T to complete one revolution. If the particle is projected with the same speed at an angle θ to the horizontal, the maximum height attained equals 4R. The angle of projection θ is given by:

  Options

  • Option A

    θ = cos⁻¹√(gT²/(π²R))

  • Option B

    θ = cos⁻¹√(π²R/(gT²))

  • Option C

    θ = sin⁻¹√(π²R/(gT²))

  • Option D

    θ = sin⁻¹√(2gT²/(π²R))

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• MCQmediumKinematics part-2 Projectile MotionProjectile from height

  A car starts from rest and accelerates at 5 m s⁻². At t = 4 s, a ball is dropped out of a window by a person sitting in the car. What are the velocity magnitude and acceleration magnitude of the ball at t = 6 s? Take g = 10 m s⁻².

  Options

  • Option A

    20 m s⁻¹, 5 m s⁻²

  • Option B

    20 m s⁻¹, 0

  • Option C

    20√2 m s⁻¹, 0

  • Option D

    20√2 m s⁻¹, 10 m s⁻²

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• MCQmediumUnit dimension and errorDimension and its application

  If force [F], acceleration [A] and time [T] are chosen as the fundamental physical quantities, find the dimensions of energy:

  Options

  • Option A

    [F][A][T]

  • Option B

    [F][A][T²]

  • Option C

    [F][A][T⁻¹]

  • Option D

    [F][A⁻¹][T]

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

  A mass m moves at speed v along +x and sticks to a mass 3m moving at speed 2v along +y. Determine velocity of the combined mass.

  Options

  • Option A

    (v/4)î+(3v/2)ĵ

  • Option B

    (v/3)î+(2v/3)ĵ

  • Option C

    (2v/3)î+(v/3)ĵ

  • Option D

    (3v/2)î+(v/4)ĵ

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