Recently Active Mechanics Questions

*Image* 1. a ball is allowed to fall from a height of 10 metre. if there is 40% loss of energy due to impact then after one impact ball will go upto a, 10 b. 8 c.6 d. 4 2. a particle is projected with kinetic energy k. its ra ...

1.A 20N block is suspended by a spring balance.A beaker containing some water is placed on a weighing machine which reads 40N.The the spring balance is lowered inside the water such that the block is fully immersed.The spring ...

a satellite is in a circular orbit very close to the surface of a planet. at some point it is given an impulse along its direction of motion, causing the vel to increase by μ times. it now moves in an elliptical orbit with t ...

a balll of density ρ0 falls from rest from a point P onto the surface of a liquid of density ρ in time T. It enters the liquid, stops, moves up n returns to P in a total time 3T. Neglect the viscosity, surface tension and s ...

1.Two strings A and B ,of same material and Ra=2Rb,are stretched by the same tension.Transverse waves travel thru these strings,find the ratio of their velocities va/vb 2.HC Verma in his book mentions velocities of 2 interfer ...

*Image* Block A is almost massless.and velocity is given to (mass=1kg) v= 8gH Find acceleration of A at initial instant. ...

If a capillary tube is dipped in a liquid of density \rho with surface tension \alpha , what is the amount of heat evolved? Take the contact angle to be \theta . ...

*Image* MY ans is not matching....... [2] its simpl bernoli but pata nahi kyun/......... ans givn is A ...

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find the ratio of magnitude of angular momentum of a rolling disk abt origin to that abt tne point O on the disk which is at a dist. R/2 frm the center.. 1.2:1 2.1:1 3.1:3 4.4:3 ...

a uniform rod AB of mass m n length l is at rest on a smooth horizontal surface. an impulse J is applied to the end B perpendicular to the rod in horizontal direction . speed of partical at a dist. l/6 frm the centre towards ...

a tube of given shape has total length 2l and an area S .its bottom and upper parts are filled with 2 non compressible non viscous liquids of densities ρ and 3ρ.if its motion is simple harmonic find the angular frequency ...

Q1. A small spherical ball of mass m and radius r rolls in a concave surface of radius R with sufficient friction. Find the time period of the resulting SHM. Q2. A body of mass m and specific gravity d(>1) floats in water. ...

hoW TO DO THIS UN BY ENERGY METHD ??? maine thoda kiya par aage [7] *Image* ...

statement1: an astronaut in an orbiting station above the earth experiences weightlessness statement 2: an object moving around the earth under the influence of earth's gravitational force is in a state of 'free fall' ...

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*Image* determine d period of oscilations of mercury of mass m=200g poured into d bent tube whose right arm forms an angle of @=30 degree wid d vertical . d cross sectional area of d tube is S=.5cm^2 d viscosity i ...

two spherical rain drops of equal size are falling vertically through air with a terminal velocity of 1 m/s. what would be the terminal speed if these two drops were to coalesce to form a large spherical drop ? ...

Conisider a liquid of density ρ filled upto the brim to of the tanker of given shape.What is the velocity of a small hole located at a distance of x from the bottom..... *Image* ...

stet1: q ptle of mass M is projected with velocity V making 45degres with horizontal at d highest pt of its path , d magnitude of its angular momentum abt d pt of projection is MV^3/ 2g stat:2- Lvector+RvecXPvecr state2- a he ...

*Image* Be serious enough to answer this .. if u know then only answer . . i don't know the answer .. u gotta give me that with explanation .. ...

The equations of 2 waves r, y1=acos(0.5Ï€x-100Ï€t) y2=acos(0.46Ï€x-92Ï€t). Find: (i)Number of times intensity is max in a time interval of 1 sec. (ii)No. of times y1+y2=0 at x=0 in 1 sec. ...

A string of negligible thickness is wound around a cylinder on a rough surface, several times.A man standing at a distance l from the cylinder holds one end of the string . THere is no slipping,find the length of string passi ...

Four snails travel in uniform, rectilinear motion on a very large plane surface. The directions of their paths are random, (but not parallel, i.e.any two snails can meet), but no more than two snail paths can cross at any one ...

*Image* This type's been hauntin me ......... I know its sumthiing to do wid ∫ pl. help ...

Hi,iam facing a problem in determining when the work done by the friction is positive ,zero and when it is negative.Please help ...

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draw the velocity- time graph of the particle moving with a constant retardation , and its initial velocity is zero ...

A vehicle of mass 'm' takes a turn of radius 'r' on a surface with friction coefficient 'μ'. The mass of vehicle is uniformly distributed so that it is at a height 'H' from the surface and at an equal distance 'a' from both ...

1.. A bicycle is riding down a rough inclined plane with a uniform velocity with the rider applying brakes on only the rear wheels. Giv the direction of friction on both the front and the back wheels. 2.. A man of mass 50kg s ...