Recently Active Mechanics Questions

Consider a thin cylinder’s shell with radius r and mass m (inertia mr^2). Two sides of the surface have different characteristics. Outer surface of the shell is a conductor with resistivity ρ and thickness δ(δ<<r). ...

Q1 2 particles execute SHM of same amplitude and frequncy on parallel lines. They pass one another when moving in opposite directions each time their displacement is half the amplitude. What is the phase diffrence between the ...

*Image* TWO BLOCKS ARE CONNECTED BY A SPRING.THE BLOCKS R PLACED ON A ROUGH HORIZONTAL SURFACE.BOTH R OF EQUAL MASS, WITH CO-EFFICIENT OF FRICTION AS mu BETWEEN BLOCK AND SURFACE. MINIMUM HORIZONTAL FORCE ON ONE MASS SO AS TO ...

A particle is thrown over a triangle from one end of a horizontal base and grazing the vertex , it falls on other end of base . If a nd b r base angles and q the angle of projection , prove tan q = tan a + tan b ........ ...

bahut dino baaaaaad!!! hope this is not a repitition of one of the previous ones!!! *Image* a book was kept on table and it was turned to turn it upside down!! what is the work done against gravity?? ab is ball mein direct DL ...

i am back with it again......... think as air gets heated up, it rises up so is there any doubt?? no, so all air that gets heated up rises up.... then answer this siimple question.... if that was true darjeeling and sikkim wo ...

*Image* all surface are roughf except the horizontal one.prove tha cofficent of friction >tan[(pie-alpha)/4] to keep the system at rest?? ...

Here's a doubt from my XI days that hadnt been solved till recently possibly bcz i hadnt given much though abt it. THe question is as follows Q. Consider a smooth rod revolving about one of its ends on a horizontal frictionle ...

A smooth wedge of mass M with a small block of mass m at the highest point of its inclined surface is released from rest on a fixed smooth horizontal surface, as shown. Initially block is at rest with respect to the wedge sur ...

PLEASE GIVE ME SOLUTION OF THE PROBLEM IN THE LINK http://www.targetiit.com/iit-jee-forum/posts/capacitors-ques-17240.html ...

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*Image* dont know where i am making the mistake but i am getting something like this 1+\tan(\theta +\phi)\tan(\phi)=0 ...

If two circle touch each other, at their highest or lowest points, and a straight line be drawn through that point to meet both circles, show that the time of sliding down form rest down the portion of this line intercepted b ...

1)A shell is fired from a cannon with a velocity V at an angle θ with the horizontal direction. at the highest point in it path it explodes into two pieces of equal masses. One of the pieces retraces its path to the cannon. ...

Q The objects lying at the equator will fly off the surface of the earth. if the speed of rotation of the earth increases n times its present value then n is _______ Q The largest and the shortest distance of the earth from t ...

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1)Consider two observers moving with respect to each other at a speed v along a straight line. they observe a block of mass m moving a distance l on a rough surface. Which of the following quantities will be same as observed ...

A point particle having a mass m is coming from V under the mutual gravitational attraction of the sphere of radius R , in which a negligibly small hole is made so that the particle may enter . Find the time it takes to reach ...

PLEAZ TRY THIS............... 1) a) find the min. velocity with which an object must be projected vertically upwards so that it doesen't returns back to the surface? b)what should the min. radius of the earth for the earth to ...

*Image* Show that when when a bar of length l, breadth b, and depth d (supported near its ends) , when loaded at the centre by a load W sags by an amount given by \delta = \frac{ W\l^{\3}}{4\ b\ d^{\3}\ Y} where Y is the Youn ...

solve hcverma ch-10 Q15 and 17 ...

A particle slides at constant speed in a horizontal circular path on the frictionless inner surface of an inverted right circular cone. How is the particle’s kinetic energy related to its potential energy ...

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a stunt man jumps his car over a crater (neglect air resistance ) then during the whole flight the driver experiences weightlessness .Why???? ...

1.Three particles are situated at 3 vertices of a triangle ABC of side a.Each particle moves with a speed v such that A moves towards B, B towards C and C towards A.Find the trajectory of the the particles. ...

Q) Which of the following statements is/are false? a) If two particles are neither approaching nor separating from each other, then their relative velocity is zero. b) Four dogs are running along a line in same direction, suc ...

1)An astronaut jumps from an aeroplane.after he had fallen 40m,then his parachute opens.Now he falls with a retardation of 2m/s2 and the earth with a velocity of 3m/s.What was the height of the the aeroplane?For how long astr ...

An open tank 10m long and 2m deep is filled upto a height 1.5m of oil of specific gravity 0.80.The tank is accelerated uniformly from rest to a speed of 10m/sec.What is the shortest time in which this speed may be attained wi ...

1.A block of mass m is placed on a smooth wedge of inclination theta.The whole system is accelerated horizontally so that the block does not slip on the wedge. What is the magnitude of force exerted by the wedge on the block ...

Fig shows 2 identical blocks of mass m kept on a smooth floor. Block A is connected with a just straight string and block B is connected to rear wall with a relaxed spring. Assume that the floor of the car is smooth and exert ...