Recently Active Mechanics Questions

a satellite is put in an orbit just above d earth's atmsphere wid vel or (1.5)^1/2 tyms d vel for circular orbit at that height .initial vel imparted was horizontal .d max disctne of d satelite frm d surface of d earth wen it ...

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two trains A N B r moving with speeds 40 m/s n 60m/s resp in same direction in a straight line track,with B ahead of A.THE ENGINES R AT front ends.the engine of train a blows a long whistle.assume that the sound of whistle is ...

in case of superposition y1=4sin(1026Î )t n y2=2sin(1024Î )t a)ratio of max to min intensity is 9\ b)amp of resulting wave vries at frequency of 3 hz c)freq of resulting wave is 510 hz d) beat freq is 6 hz ...

the frequency of note heard by listener increases by 10% when the listener is moving towards stationary source.find incorrect ans a)v of listener is 10% vel of sound b)vel of listener is doubled ,then change in frequency is d ...

Two trains A and B are moving with speeds 20 m/s and 30 m/s respectively in the same direction on the same straight track, with B ahead of A. The engines are at the front ends. The engine of train A blows a long whistle. The ...

In the figure shown surface of massless pulley is smooth. The string is massless. The two blocks are placed on a smooth horizontal surface . A time varying force F=20t is applied. Considering the two blocks and the pulley and ...

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*Image* IT WAS ASKED IN IIT 2008 A uniform thin cylindrical disk of mass M and radius R is attached to two identical massless springs of spring constant k which are fixed to the wall as shown in the figure. The springs are at ...

true or false The air bubble has only one free surface. ...

a large closed vessel of height H contains a liquid. at the intial moment, the height of the liquid in the vessel is H/2, the space above being filled with air at atmospheric pressure. when the height falls to H/4, find the v ...

if traffic rules are changed in india n instead of left lane rule vehicles r ordered to drive on right side on roads wat ll be effect on length of day? ...

Two cars A and B are moving in the same direction with the uniform velocities of 40km/hr and 30km/hr respectively. They are separated by a distance of 5km. Another car C moving in the oppostie direction with a velocity of 25k ...

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The vessels shown have same base area .Equal volume of a liquid r poured in the 3 vessels . The force on the base will be maximum 4 (A) A (B) B (C) C (D) D (E) All have equal force on their bases *Image* ...

Density of a liquid varies with depth P(ro)=ah. A small ball of density p0 is released from the free surface of the liquid. Then-- a>. the ball executes SHM of amplitude p0/a b>. the mean pos. of the balll will be at ad ...

A boy is staning in an elevator accelerating upward throws a ball upward with a velocity V. The ball returns in his hands after a time t.The accelaraion of the lift is :???? ...

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VERY EASY I KNOW, i jus wanted 2 know the conditn on FORCE 4 unstabl equi. *Image* ...

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If the time taken by a aparticle sliding down a smooth inclined plane is twice of that it would take if it would have fallen down through the vertical height of the inclined plane.What is the inclination of the plane?? ...

The minimum energy required to launch a m kg satellite from earth;s surface in a circular orbit at an altitude 2R where R is the radius of earth ...

a cylinder of heoght h made of a material of density ρ and young`s modulus Y is placed on a horizontal surface. compression in the cylinder due to its own weight is ? ...

A particle has a initial velocity of 9m/s due east , a constant acceleration of 2 m/s2 due west .the distance covered by it in the 5th second of its motiion is a)0 b)0.5 c)2 d)4 ...

two springs A nd B are identical except that A is stiffer than B i.e ka>kb . on which spring more work will be done if they are stretched by the same force? a)Wa>Wb b)Wb>Wa c)Wa=Wb d)Wa≥Wb ...

Two discs A and B are mounted coaxially on a vertical axle.The discs have moments of inertia I and 2Iabout the common axis.Disc A is imparted an initial angular velocity 2ω and disc B is imparted an angular velocity ω. Both ...

DONT V NEED VALLUE OF μ TO SOLVE THIS UN?? *pl. bear wid poor picture quality *Image* ...

a disc of raduius R is attached to a rod of length L, which is rotating about a horizoontal axis through the other end. if the velocity off the centre is v at a certain moment, find the velocity of the farthest point from the ...