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A circular ring of diameter 40cm and mass 1kg is rotating about an axis normal to its plane and passing through the centre with a frequency of 10 rotations per second. Calculate the angular momentum about its axis of

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(a) A cat is able to land on its feet after a fall. Why?(b) If angular momentum moment of inertia is decreased, will its rotational K E. . be also conserved?

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A wheel 0.5m in radius is moving with a speed of 12m/s. find its angular

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State the condition for translational equilibrium of a

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How is angular momentum related to linear

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A planet revolves around on massive star in a highly elliptical orbit is its angular momentum constant over the entire orbit. Give

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Obtain the equation `w=w+o+ at`

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What is the torque of the force `vecF=2hati-5hatj+4hatk` acting at the point `vecr=(3hati+3hatj+3hatk)m` about the

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The moment of inertia of a solid sphere about a tangent is `7/5MR^2` . Find the moment of inertia about a

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Four particles of mass 1kg, 2kg, 3kg and 4kg are placed at the four vertices A, B, C and D of square of side 1m. Find the position of centre of mass of the

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(a) Why is moment of inertia called rotational inertia? (b) Calculate M.I of a uniform circular disc of mass 500gm and radius 10cm about (i) Diameter (ii) axis tangent to the disc and parallel to diameter (c) Axis passing trough centre and perpendicular to its

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On which fundamental law of physics is keplers second law is

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Which is greater the attraction of the earth for 1 kg of aluminum or aluminum or attraction of 1kg of aluminum for the

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Distance between two bodies is increased to three times its original value. What is the effect on the gravitational force between

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The distance of the planet Jupiter from the sun is 5.2 times that of the earth.Find the period of the Jupiter’s revolution around the

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Show that for a two particle system

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State two essential requisites of geostationary

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Show that an artificial satellite circling round the earth in an orbit of radius obeys keeper’s third

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A 400kg satellite in a circular orbit of radius 2 Re about the earth calculate the kinetic energy potential energy and total energy of the satellite? `R_E = 6.4xx10^6m M = 6xx10^(24)kg`

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Two uniform solid spheres of radii R and 2R are at rest with their surfaces just touching. Find the force of gravitational attraction between them if density of spheres be

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