Free physics question bank
torque and rotational equilibrium questions with solutions
Practice Rotational Motion for JEE Main, JEE Advanced, NEET, and Classes 11–12. Attempt each question, then open it for the full solution.
Showing 1–10 of 10 questions
- IntegermediumRotational Motion
A force =î-ĵ+k̂ acts at the point (1,1,1). Find the magnitude of the z-component of torque about the origin.
JEE Mains 2025 29 Jan Morning Shift
Open question & full solution → - MCQeasyRotational Motion
A heavy iron bar, of weight W is having its one end on the ground and the other on the shoulder of a person. The bar makes an angle θ with the horizontal. The weight experienced by the person is:
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JEE Mains 2024 09 Apr Morning Shift
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Q31. A solid sphere of radius 4 cm and mass 5 kg rotates about an axis through its centre with angular speed 1200 rpm. A constant opposing torque brings the sphere to rest in 10 s. What are, respectively, the magnitude of the applied torque and the number of revolutions completed before coming to rest?
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JEE Mains 2026 6 April Morning Shift
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A force =(î+2ĵ-3k̂) N acts at a point whose position vector is =(2î-3ĵ+7k̂) m. Find the torque about the origin.
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JEE Mains 2025 22 Jan Evening Shift
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A square lamina OABC of side 10 cm is pivoted at O. Forces act on the lamina as shown in the original figure. If the lamina remains stationary, the magnitude of F is:
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JEE Mains 2025 2 April Morning Shift
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A heavy iron bar of weight 12 kg is having its one end on the ground and the other on the shoulder of a man. The rod makes an angle 60° with the horizontal, the weight experienced by the man is :
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JEE Mains 2024 27 Jan Evening Shift
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An object of mass 8 kg is hanging from one end of a uniform rod CD of mass 2 kg and length 1 m pivoted at its end C on a vertical wall as shown in figure. It is supported by a cable AB such that the system is in equilibrium. The tension in the cable is: (Take g = 10 m/s²)
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JEE Mains25 January 2023Morning Shift
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A uniform disc of mass 2 kg and radius 1 m is acted upon by torque τ(t)=5t²-8t N m. The disc starts from rest. Find the power delivered by the torque at t=1 s.
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JEE Mains 2025 23 Jan Evening Shift
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Which of the following are correct expressions for torque acting on a body? A. τ = r×L. B. τ = d(r×p)/dt. C. τ = r×(dp/dt). D. τ = Iα. E. τ = r×F. Choose the correct set.
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JEE Mains 2025 4 April Morning Shift
Open question & full solution → - IntegermediumRotational Motion
A thin solid disc of mass 1 kg rotates about a diameter at 1800 rpm. A constant external torque 25π N·m acts for 40 s, increasing its speed to 2100 rpm. Find the diameter of the disc in metres.
JEE Mains 2025 8 April Evening Shift (Shift 2)
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