A boy ties a stone of mass 100 g to the end of a 2 m long string and whirls it around in a horizontal plane. The string can withstand the maximum tension of 80 N. If the maximum speed with which the stone can revolve is

Published Monday, October 24, 2022

A vertical electric field of magnitude 4.9 × 10^5 N/C just prevents a water droplet of a mass 0.1 g from falling.

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A force vec F = (4xvec i + 3yvec j) , where vec F is in newtons and x and y are in meters, acts on an object as the object moves in the x direction from the origin to x = 5.00 m . Find the work W = intvec F· dvec r done by the force on the object.

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Introduction To One Dimensional Arrays

Published Sunday, October 23, 2022

Three identical particle A, B and C of mass 100 kg each are placed in a straight line with AB = BC = 13 m. The gravitational force on a fourth particle P of the same mass is F, when placed at a distance 13 m from the particle B on the perpendicular bisector of the line AC. The value of F will be approximately : 

Published Saturday, October 22, 2022

A solid cylinder and a solid sphere, having same mass M and radius R, roll down the same inclined plane from top without slipping. They start from rest. The ratio of velocity of the solid cylinder to that of the solid sphere, with which they reach the ground, will be :

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A body of mass 0.5 kg travels in a straight line with velocity v = a x^3/2 where a = 5 m^-1/2s^-1 . The work done by the net force during its displacement from x = 0 to x = 2 m is

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A particle moves from A to B in a circular path of radius R covering an angle theta as shown in the figure, find the ratio of the magnitude of distance and displacement of the particle.

Published Friday, October 21, 2022

If momentum P, area A and time T are taken to be fundamental quantities, then the energy has the dimensional formula

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The surface area of a spherical balloon,being inflated changes at a rate proportional to time the if initially its radius is 3 units and after 2 seconds it is 5 units, find the radius after t seconds.

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