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in an elastic string whose natural length is equal to that of a uniform rod be attached to the rod at both ends n suspende at middle point a)the rod ll sink until total wrk is non zero b)the rod ll sink until d total wrk done ...
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Q a particle moves on acurved path with constant sped v .the acceleration of particle at x=0 is 2av2 .the path of particle is a)straight line b)parabolic c)eliptical d)none ...
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think of a vertical semicircle(Ω).a square plate is at rest at the lower most position at t=0 n moves as such θ=1.5t2 wer θ is in radian n tym is in sec .a small object p of mass 0.4 kg is temporarly fixed to the plate wid ...
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kinetic energy of a particle along a circle of radius r depends on the distance covered as T=ks2 where k is a constant.find the force acting on a particle as a f:n of s a)2k/s*√(1+[s/r]2) b)2ks√(1+[r/s]2) c)2ks√(1+[r/s] ...
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q a rod oa rotates about a horizontal axis about o with a constant anticlockwise velocity w=3 radians per second. as it passes the position θ=0 a small block of mas m is placed on it at aradial distance of r=450mm if the blo ...
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a uniform fine chain of length l is suspended with lower end just touching a horizontal table.find the pressure on the table wen a length x haS Reached d table 1 mgx 2 2mgx' 3 3mgx 4 mgx/2 i m getting 3mgx sum1 plzz check ...
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a block a of mass 2 kg rests on a rough horizontal plank ,the coefficient of friction between planck n block =0.2 if planck is puled horizontally with a constant acceleration of 3.96 m/s2 ,the distance moved in metre by block ...
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fine particles of a substance are to be stored in a heap on ahorizontly circular plate of radius a if the coefficient of static friction bw particles is k the maximum possible height is A ak B ak/2 C a/k d ak2 ...
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a bicycle is in motion .when it is not pedaled the force of friction exerted by ground on the two wheels is such that it acts a)in the backward direction on the front wheel and in the forward direction on the rear wheel b)in ...
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1 mole n2o4 at 300 k is kept in a closed container under 1 atmosphere .it is heated to 600 k wen 20"% by mass n204 decomposes to no2 .the resultan pressure is a)1.2 atm b)2.4 atm c)2 atm d)1 atm ...
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wat s d product of glycerine wen it s heated with oxalic acid at 110°c ...
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which of following os not ah example of pseudo unimoleculer reactions a)ch3cooc2h5+h2o gives (in presence of h+) ch3cooh+c2h5oh b)same reaction in presence of oh- c)c12h22011+h2o giving c6h12o6 in presence of h+ d)ch3cocl+h2o ...
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a parrot is sitting on the floor of a closed glass cage which is in a boys hand .if the parrot starts flying with constant speed ,the boy ll feel the weight of the cage a)unchanged b)reduced c)increased d)nothing can be said ...
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a particle of mass m is moving under variable force F IFmagnitude of F is constant the the possible path of particle can never be a)rectilinear b)circle c)ellipse d)parabola ...
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wen the range of projectile on a n inclined plane is maximum then a)focus of the path is on the plane b)focus of the path is below the plane c)focus of path is above the plane d)focus of path can be at any place ...
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q a particle is projecte from horizontal plane to pass over two objects at height h n k n aslant distance d apart. wat s least possible speed of projection a)g(h+k+d) b)√[g(h+k+d)] c)h(g+k+d) d)√[h(g+k+d)] ...
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q1 two particles describe the same circle of radius a in the same sense with the same speed v .wat sr der relative angular velocity .is it 0 or v/a q2if the acceleration of a particle is a function of distance as a =f(x) a)ve ...
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if a rigid body is rotating about an axis passing through the point 2i-j-k and parllel to i-2j+2k with an angular velocity of 3 radians/sec then find the velocity of the point of rigid body whose position vector is 2i+3j-4k a ...
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an insect crawls from one corner of cubical room to another diagonally opposite corner .wat is minimum distance travelled by insect? a)89.44ft b)95.44ft c)40ft d)80 ft ans is a plzz explain ...
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Q1 AMPLITUDE OF A WAVE REPRESENTED BY A=a/(a+b-c).the resonance ll occur wen a)b=-c/2 b)b=0 n a=c c)b=-a/2 d)none Q2 radiations of intensity 0.5w/m2 are striking the metal surface .the pressure on metal plate is a)0.166*10pow ...
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consider a long,straight wire of cross section a carrying current i .let there be n free electrons per unit volume .an observer places himself on a trolley moving in direction opposite to current with a speedv=i/nAe n separat ...
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the magnetic field inside a tightly wound long solenoid is b=μni .it suggests field does not depend on the length of solenoid .if we add more loops at the end of solenoid the field shud nt increase .explain qualitatively why ...
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two wires carrying current may attract each other .in absence of other forces they ll move towards each other wid increasing kinetic energy.does it contradict wid the fact ttht magnetic field does no wrk n hence cant increase ...
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two wires carrying equal currents is placed prependicular to each other .one is fixed n one is free to move wat kind of motion ll result? ...
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the extension in a string obeying hooke s law is x .the speed of sound in stretched string is v .if extension is increased to 1.5 x then speed of sound ll be a)1.22v b).61v c)1.5v d)o.75v ...
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in adiabatic compression decrease in volume is assosiated with a)inc in temp n decre in pressure b)decr in temp n incre in pressr c)decre in both d0inc in both ...
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the contact angle b/w pure water n pure silver is90°if capillary tube made of silver is dipped at one end in pure water ,llwater rise in capilliary ...
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we know viscous force is 6 (pi)nrv so do we ve viscous force acting b/w layers even if there is no relative motion ...
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q if a deforming force is applied to the rubber n it is suddenly removed wat ll happen to energy /ll it be absorbed or released while regaining its shape (rubber is perfectly elastic) ...
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when a metal wire elongates by hanging a load on it , the gravitational potential is decreased then a)this energy completely appears as increased kinetic energy of the block b)this energy completely appears as incresed potent ...
