A meter stick of mass 400 g is pivoted at one end and displaced through an angle 60°.
A meter stick of mass 400 g is pivoted at one end and displaced through an angle 60°. The increase in its potential energy is
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(a) 2 J (b) 3 J (c) […]
Questions
Two rigid bodies A and B rotate with rotational kinetic energies Eᴀ and Eʙ
Two rigid bodies A and B rotate with rotational kinetic energies Eᴀ and Eʙ respectively. The moments of inertia of A and B about the axis of rotation are Iᴀ and Iʙ respectively. If Iᴀ […]
The friction of the air causes a vertical retardation equal to 10%
The friction of the air causes a vertical retardation equal to 10% of the acceleration due to gravity (take g=10 ms⁻²). The maximum height will be decreased by
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(a) 8% (b) 9% […]
A body moves with a uniform acceleration a and zero initial velocity
A body moves with a uniform acceleration a and zero initial velocity. Another body B starts from the same point moves in the same direction with a constant velocity v.The two bodies meet after a […]
A particle moves with constant speed v along a circular path of radius r and completes
A particle moves with constant speed v along a circular path of radius r and completes the circle in time T. The acceleration of the particle is
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(a) 2πv/T (b) 2πr/T (c) 2πr²/T […]
A cycle wheel of radius 4 m completes one revolution in two seconds. Then acceleration
A cycle wheel of radius 4 m completes one revolution in two seconds. Then acceleration of cycle will be
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(a) π² ms⁻² (b) 2π² ms⁻² (c) 4π² ms⁻² (d) 8π² ms⁻²
Correct Answer: […]
A current I ampere flows along the inner conductor of a co-axial cable and returns
A current I ampere flows along the inner conductor of a co-axial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance […]
A charged particle experiences magnetic force in the presence of magnetic field.
A charged particle experiences magnetic force in the presence of magnetic field. Which of the following statement is correct?
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(a) The particle is moving and magnetic field is perpendicular to the velocity […]
The vector sum of two forces is perpendicular to their vector difference. In that case,
The vector sum of two forces is perpendicular to their vector difference. In that case, the forces
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(a) Are equal to each other in magnitude (b) Are not equal to each other […]
A force of 10 newton acts on a body of mass 20 kg for 10 seconds. Change in its momentum
A force of 10 newton acts on a body of mass 20 kg for 10 seconds. Change in its momentum is
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(a) 5 kg. ms⁻¹ (b) 200 kg. ms⁻¹ (c) 100 kg. ms⁻¹ […]