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Day 208: JEE Mains Physics

5 questions. Try each one first, then open its answer.

  1. Question 1

    Laws of Motion. Asked once: 1 Feb 2024 (same type asked 3 times) See all 3 of this type

    99
    A cricket player catches a ball of mass 120 g120\text{ }g moving with 25 m/s25\text{ }m/s speed. If the catching process is completed in 0.1 s0.1\text{ }s then the magnitude of force exerted by the ball on the hand of player will be (in SI unit):

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  2. Question 2

    Oscillations. Asked once: 13 Apr 2023 (same type asked 3 times) See all 3 of this type

    23
    At a given point of time the value of displacement of a simple harmonic oscillator is given as y=Acos(30∘)y = Acos\left( 30^{\circ} \right). If amplitude is 40 cm40\text{ }cm and kinetic energy at that time is 200 J200\text{ }J, the value of force constant is 1.0×10xNm−11.0 \times10^{x}Nm^{- 1}. The value of xx is___

  3. Question 3

    System of Particles and Rotational Motion. Asked once: 30 Jan 2024 (same type asked 3 times) See all 3 of this type

    113
    Two discs of moment of inertia I1=4 kg m2I_{1}= 4\text{ }kg{\text{ }m}^{2} and I2=2 kg m2I_{2}= 2\text{ }kg{\text{ }m}^{2} about their central axes & normal to their planes, rotating with angular speeds 10rad/s10rad/s &4rad/s\& 4rad/s respectively are brought into contact face to face with their axes of rotation coincident. The loss in kinetic energy of the system in the process is ____ J.

  4. Question 4

    Gravitation. Asked once: 10 Apr 2023 (same type asked 3 times) See all 3 of this type

    2
    Assuming the earth to be a sphere of uniform mass density, the weight of a body at a depth d=R2d =\frac{R}{2} from the surface of earth, if its weight on the surface of earth is 200 N200\text{ }N, will be: (Given RR = Radius of earth)

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  5. Question 5

    Oscillations. Asked once: 10 Apr 2023 (same type asked 3 times) See all 3 of this type

    112
    A rectangular block of mass 5 kg5\text{ }kg attached to a horizontal spiral spring executes simple harmonic motion of amplitude 1 m1\text{ }m and time period 3.14 s3.14\text{ }s. The maximum force exerted by spring on block is___ NN.