Two discs of moment of inertia l₁ and I₂ and angular speeds ?￢ﾂﾁ and ?￢ﾂﾂ are rotating along collinear axes passing through their centre of mass and perpendicular to their plane.If the two are made […]
A body of mass m slides down an incline and reaches the bottom with a velocity v, if the same mass were in the form of a ring which rolls down this incline, the velocity […]
A block slides from an inclination of 45°.If it takes time twice with friction than to that without friction, then coefficient of friction for surface is given by
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(a) 1 (b) 0.75 […]
A long horizontal rod has a bead which can slide long its length and initially placed at a distance L from one end A of the rod.The rod is set in angular motion about A […]
Two racing cars of masses m₁ and m₂ are moving in circles of radii r₁ and r₂ respectively.Their speeds are such that each makes a complete circle in the same time t.The ratio of the […]
The product of pressure and volume have the same units as the product of
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(a) Charge and potential (b) electric field strength and distance (c) eletromotive force and capacitance (d) magnetic moment […]
Two bodies of mass 10 kg and 5 kg moving in concentric orbits of radius R and r such that their periods are the same.Then, the ratio between their centripetal acceleration is
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An elevator car whose floor to ceiling distance is equal to 2.7m starts ascending with constant acceleration of 1.2 ms⁻².After 2s of the start, a bolt begins falling from the ceiling of the car.The free […]
Three solids of masses m₁,m₂ and m₃ are connected with weightless string in succession and are placed on a frictionless table.If the mass m₃ is dragged with a force.T the tension in the string between […]
The kinetic energy of particle moving along a circle of radius R depends upon the distance s as k= as².Then the force acting on particle is
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(a) 2as²/R (b) 2as [ 1 […]
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