Recently Active Mechanics Questions

i created this for those who want to revise old chapters..............admins plzzz take pains to create a sub topic named revision.....yeah gravitation is my second best chapter......y not start with it??????????? ...

IF TWO BLOCKS GLUED TOGETHER ARE ATTACHED TO A SPRING & ONE OF THEM FALLS INSTANTANEOUSLY ,,,,,,,,,,,THEN FIND AMPLITUDE OF OSCILLATION OF FIRST *Image* ...

Can centripetal/centrifugal forces be never applied to bodies on earth ? ...

Can we always assume g varies with height as g'=g(1- 2h/r ) ??? ...

A man standing on a platform holds weights in his outstretched arms. The system is rotated about a central vertical axis. If the man now pulls the loads inwards close to his body, then : A) angular vel. of the sys. will incre ...

A solid homogeneous sphere is moving on a rough horizontal surface partly rolling and partly sliding. During this kind of motion of the sphere : A) total K.E of the sphere is conserved B) angular momentum of the sphere about ...

r represents the pos vector of a particle and ω and a are non zero contants (contant mag includes a zero mag) A)r=cos(ωt)i +sin(ωt)j + (at)k B)r=5cos(ωt)i +5sin(ωt)j C)r=(5at2)i +(2at)j D)r=5[cos(ωt2)i +sin(ωt2)j] p)co ...

*Image* A cat starts from a point A and heads straight for a point P with a constant speed v, while at the same instant a dog starts running after after the cat with a constant speed u from a point B such that his velocity is ...

sorry dudes but i am posting a lot of questins these days it is due to phyiscs olympaid which is on sunday Mercyry is poured into a you tube in which the cross sectional area of the left limb is 3 times smaller than the right ...

A car is travelling at 5 m/s.another car in the parking lot just 11 m ahead of the 1st car starts at an acc. of 1m/s2.in what time will both meet? a)4 s b)6 s c)4 and 6 s d)Never ...

A typhoon originates in the Indian ocean.satellite imaging shows that the distance travelled by it are 105 and 95 in the 1st 2 hours after it originated.It is dangerous at speeds above 50 kmph.find the time taken for it to su ...

true or false.....with explaination 1) work done by kinetic friction on a body is never 0 2)work done by Kinetic friction on a system is always negative plzzz give expalination also ...

in dc pandey it is writen there is no difference between waves represented by the equations y=Asin(wt-kx) and y=Asin(kx-wt) thats easy now we know the difference is that one is moving downwards and other is moving upwards now ...

i hv two or three doubts in error analysis first when we are calculating zero errors for vernier calipers we find that the positive and negaticve zero errors are different mainly i cant understand this that wjen nothing is pu ...

true or false.....with explaination work done by kinetic friction on a body is never 0(in ground frame) ...

hey dudes can anyone help me with a shms in different direction like in r=(1+2coswt)i+(3sin^{}2 wt)+(3t)k the qiestion asked was what is the shm and what is the time period and so on........... x=Asin^{}2 wt+Bcos^{}2 wt +Csin ...

*Image* a rod of length 2m moves in horizontal x-y plane. at any instant end 'a' of the rod is at the origin and has velocity V1 (see fig.). the other end B at the same instant is moving with velocity V2 (see fig.). t ...

*Image* smaller ball mass = m ; larger mass = 3m ; spring constant =k; smaller mass pressed down by a distance δ. Then comes my doubt : which one is right : 1) N (normal reacn.) = mg + 3mg + kδ 2) N = mg + 3mg - kδ My expl ...

*Image* A rod of length 2m moves in horizontal x-y plane .At any instant end a of the rod is at origin and has velocity vA=2i+vyj.the other end B aty the same instant is moving with velo=vB=2i+6j.the rod makes an angle of 30Â ...

Two particles execute S.H.M. of same amplitude and frequency along the same straight line from same mean position. They cross one another without collision, when going in opposite directions, each time their displacement is 3 ...

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How to find constraint equation when pulleys are connected over a horizontal plane?Please give an example. ...

*Image* A block B of mass M is suspended from a chord of length l attached to a cart A of mass M as shown in the fig.the horizontal surface on which the cart moves is smooth .initially both the cart and the bock are at rest i ...

i was giving a test in target iit and there was a question that the graph of v with respect to n of an electron and according to me it should be a rectangular hyperbola in the downwards drireciton shouldn it ...

JUST WANT ANSWERS FOR VERIFICATION *Image* For the system shown in figure find: (a) the linear acceleration of hoop (b) angular acceleration of hoop of mass M (c) tension in the rope masses are M and m and radius of hoop is r ...

A car moves uniformly along a horizontal sine curve y = a sin (x / b) , where a and b are constants. The co-efficient of friction between the wheels and the road is equal to k. At what velocity will the car ride without slidi ...

can anyonepls tell me what is the avg cutoff for nsep so that part b si corrected and what is the avg marks needed to score to qualify ...

as we know static friction does work but i hv some doubts which i hope will be resolved 1) is the work done by friction in pure rolling 0 as the pnt of contact has no relative velocity 2) the work done by staric friction has ...

A particle is projected vertically with velocity v0.Wind is blowing and providing constant horizontal accelaration a0.If the particle strikes the wall perpendicularly,find the distance between the wall and the point of projec ...

a particle is projected with a velocity 2√gh so tht it just clears two walls of equal height h which r at a distance 2h frm each other. show that the time of passing b/w the walls is 2√h/g..... ...