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A uniform rod of density ∂ is placed in a wide tank containing a liquid of density ∂o(∂o>∂). The depth of liquid in the tank is half the length of the rod. The rod is in equilibrium , with its lower end resting on ...
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Two 20-g flatworms climb over a very thin wall, 10 cm high. one of the worms is20 cm long the other is wider and only 10 cm long. Which of them has done more work against gravity when half of it is over the top of the wall? W ...
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ther are n wedges which are placed as shown in figure *Image* coefficient of friction is \mu for each surface and masses of wedges are m,m/2,m/4...m/2^(n-1) respectively and after placing on one another they make \theta angle ...
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*Image* A sphere of radius r and mass m has a linear velocity v0 directed to the left and no angular velocity as it is placed on a belt moving to the right with a constant velocity v1. If after sliding on the belt the sphere ...
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*Image* A loon the loop apparatus is made of quadrant of radius 4r joined to semi circle of radius r as shown. the track is frictionless and a small particle of mass m slides down starting from the highest point A of the quad ...
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A steel ball of radius R=20cm and maass =2kg is rotating about a horizontal diameter with angular velocity w naught=50 rad/sec. this rotating ball is dropped onto a rough horizontal floor and falls freely through a height of ...
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*Image* Two discs of masses M and M/4 having radii R andR/2 resp. are kept on a smooth horiontal surface. The larger disc has a freely moving axle pivoted through its centre. the smaller disc having light thread wrapped over ...
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*Image* The 2.7 kg cylinder B and 1.8 kg wedge A are released from a bigger triangular wedge C wich is fixed. the angle of inclination of C is 30 degrees frm the horizontal.Assuming that cylinder rolls without sliding on the ...
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A thin rod of length 2R and mass m is standing(vertically) on a perfectly smooth floor. the state of equilibrium in which the rod is at res is unstable, and the rod falls. find the trajectories that the various points of the ...
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can anyone pls solve this for me?a rain drop falls from rest in an atmosphere saturated with water vapour. as it falls, water vapour condenses on the drop at the rate of mass mu per second. if initial mass of drop is m naught ...
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HW IS RESNIC FR PHY MECHANICS ARE QUE TOUGH ARE THEY CANT BE CRAKED BY CBSE CONCEPTS ARE SOME EXTA KNW LEDE IS REQIRED ????? ...
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For CONCAVE minuscus adhesive force>cohesive For CONVX minuscus adhesive< cohesive For plane (neither concave nor convx angle of contact =90°) : a) adhesive<cohesive b) adhesive>cohesive c) adhesive=cohesive ???? ...
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If the resultant of all the external forces acting on a system of particles is zero, then from an inertial frame one can surely say that (A) linear momentum of the system does not change in time (B) kinetic energy of the syst ...
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(1) 2 loudspeakers are emitting sound waves of wavelength \lambda with an initial phase difference of \frac{\Pi }{2} .At what minimum distance from O on line AB will one hear a maxima? *Image* (A)25\lambda (B)\frac{100\lambda ...
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Q. A container is filled with liq of density d upto a height h. now a pin hole having cross sectional area 'a' is made at the bottom of the container. The area of cross section of the container is A. take a/A = 2*10-4. The ac ...
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You gotta hate em. Especially when you get problems like these. Q. The time period of a simple pendulum of length L is measured in an elevator descending with acc a = g/3. What is the value? ...
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I just dont know how to use pascal's equal height-equal pressure law in cases where the point of considerations are at same height BUT the level of liquid above each of them is different from other .. for eg : PLEASE SOLVE TH ...
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Q1: A dog is sitting in a boat which is floating in a pond.The dog drinks some water from the pond.Prove that the level of water remains unchanged . My doubt : I dont know how to prove this BCOZ I DONT KNOW HOW TO CONSIDER TH ...
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Q1. A neutral solid sphere has an unsymmetrical cavity in which in charge q is placed. Find potential at P. *Image* Q2. *Image* ...
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An insect crawls up a hemispherical surface very very slowly. The coefficient of friction between the insect and the surface is 1/3. If the line joining the centre of the hemisphere to the insect makes an angle of \alpha with ...
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will friction behave as a conservative force in quasi-static process? ...
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hey fr9ds long time i posted any question so here is 1 lets take a rod rotating abt a hinge so my question is around which pnt is the rod rotating abt its hinge or abt the com it can also be said to be rotating abt the com as ...
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A disc initially at rest, starts rotating eith uniform acceleration.During first 5 secs it describes an angle \beta .During next 5 secs d angle described is \gamma . Find d value of \frac{\gamma }{\beta } . ...
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A long metal rod of length l and relative density ∂ is held vertically with its lower end just touching the surface of water.The speed of the rod when it just sinks in water is given by a)√(2 g l) b)√(2 g l ∂) c)√(2 ...
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*Image* Two blocks A and B of masses 2 kg and 1 kg respectively are conected as shown and are at rest. The pulleys P1 and P2 are light and frictionless. A shell C of mass 1 kg moving vertically up with velocity 10 m/s collide ...
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*Image* suppose there is fluid filled along the length of the tube and density is p angular velocity is w area of cross section is a and there is an orifice at the end find the velocity of the fluid coming out!!! ...
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The coefficient of friction between an insect and a hemispherical bowl of radius r is \mu . The maximum height to which the insect can crawl in the bowl is A) \frac{r}{\sqrt{1+\mu ^{2}}} B) r\left[1-\frac{1}{\sqrt{1+\mu ^{2}} ...