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Rotational Motion question

2022 · Shift 1 · Q52
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  5. /2022 · Shift 1 · Q52

Rotational Motion question

2022 · Shift 1 · Q52

JEE AdvancedPhysicsRotational MotionMCQ+3 / −1

List I describes four systems, each with two particles AAA and BBB in relative motion as shown in figures. List II gives possible magnitudes of their relative velocities (in ms−1m s^{-1}ms−1) at time t=π3st=\frac{\pi}{3} st=3π​s.

List-I List-II
(I) AAA and BBB are moving on a horizontal circle of radius 1 m1 \mathrm{~m}1 m with uniform angular speed ω=1rads−1\omega=1 \mathrm{rad} \mathrm{s}^{-1}ω=1rads−1. The initial angular positions of AAA and BBB at time t=0t=0t=0 are θ=0\theta=0θ=0 and θ=π2\theta=\frac{\pi}{2}θ=2π​, respectively.
JEE Advanced 2022 Paper 1 Online Physics - Rotational Motion Question 23 English 1
(P) 3+12\frac{\sqrt{3}+1}{2}23​+1​
(II) Projectiles AAA and BBB are fired (in the same vertical plane) at t=0t=0t=0 and t=0.1 st=0.1 \mathrm{~s}t=0.1 s respectively, with the same speed v=5π2 m s−1v=\frac{5 \pi}{\sqrt{2}} \mathrm{~m} \mathrm{~s}^{-1}v=2​5π​ m s−1 and at 45∘45^{\circ}45∘ from the horizontal plane. The initial separation between AAA and BBB is large enough so that they do not collide. (g=10 ms−2)\left(g=10 \mathrm{~ms}^{-2}\right)(g=10 ms−2).
JEE Advanced 2022 Paper 1 Online Physics - Rotational Motion Question 23 English 2
(Q) 3−12\frac{\sqrt{3}-1}{\sqrt{2}}2​3​−1​
(III) Two harmonic oscillators AAA and BBB moving in the xxx direction according to xA=x0sin⁡tt0x_{A}=x_{0} \sin \frac{t}{t_{0}}xA​=x0​sint0​t​ and xB=x0sin⁡(tt0+π2)x_{B}=x_{0} \sin \left(\frac{t}{t_{0}}+\frac{\pi}{2}\right)xB​=x0​sin(t0​t​+2π​) respectively, starting from t=0t=0t=0. Take x0=1 m,t0=1 sx_{0}=1 \mathrm{~m}, t_{0}=1 \mathrm{~s}x0​=1 m,t0​=1 s.
JEE Advanced 2022 Paper 1 Online Physics - Rotational Motion Question 23 English 3
(R) 10\sqrt{10}10​
(IV) Particle AAA is rotating in a horizontal circular path of radius 1 m1 \mathrm{~m}1 m on the xyx yxy plane, with constant angular speed ω=1rads−1\omega=1 \mathrm{rad} \mathrm{s}^{-1}ω=1rads−1. Particle BBB is moving up at a constant speed 3 m s−13 \mathrm{~m} \mathrm{~s}^{-1}3 m s−1 in the vertical direction as shown in the figure. (Ignore gravity.)
JEE Advanced 2022 Paper 1 Online Physics - Rotational Motion Question 23 English 4
(S) 2\sqrt{2}2​
(T) 25π2+1\sqrt{25\pi^{2}+1}25π2+1​

Which one of the following options is correct?

  1. A
    I →\rightarrow→ R, II →\rightarrow→ T, III →\rightarrow→ P, IV →\rightarrow→ S
  2. B
    I →\rightarrow→ S, II →\rightarrow→ P, III →\rightarrow→ Q, IV →\rightarrow→ R
  3. C
    I →\rightarrow→ S, II →\rightarrow→ T, III →\rightarrow→ P, IV →\rightarrow→ R
  4. D
    I →\rightarrow→ T, II →\rightarrow→ P, III →\rightarrow→ R, IV →\rightarrow→ S
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