Recently Active Mechanics Questions

\; \; A\; \; BODY\; \; SLIDES\; FROM\; \; REST\; \; A\; \; LENGTH\; \; l\; \; DOWN\; \; A\; \; ROUGH\; \; PLANE\; \; OF\; \; INCLINATION\; \; \alpha \; AND\; \; COMES\; TO\; \; \; REST\; \; AFTER\; \; SLIDING\; \; A\; \; DIST ...

A solid sphere of mass m and radius r is placed inside a hollow spherical shell of mass M and radius R as shown in figure .A particle of mass m^' is placed on the line joining the two centres at a distance x from the point of ...

Two bodies of masses 10kg and 20kg are plaeced at a distance 1.0 m apart and released.Assuming that only mutual gravitational forces are acting,find the speeds of the particles when the separation reduces to 0.5 m. ...

What is the Diff between streamline and steady flow....?? In which case can we use the equation A1V1 = A2V2 ?? ...

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A particle of mass m moves on x axis as follows:It starts at t=0 from x=0 and comes to rest at t=1 and x=1.If 'a' denotes the instantaneous accelaration of this particle then, a) a can not remain +ve for all t in the interval ...

draw the approximate time dependence of moduli of an and tangntial at accelration vectors,as well as of the projetion of total acceleration vector av on the velocity vector direction for a projectile fired at angle @ from azi ...

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 ...

AB is a string whose one end A is fixed at the highest point of a ring placed in vertical plane. C is the center of the ring. At other end B of the ring, is attached a bead of mass m , wich can slide along the ring.If the bea ...

A particle starts from rest with constant acceleration . The ratio of space - average velocity to the time -average velocity is ...

IF THE MINIMUM HORIZONTAL FORCE REQUIRED TO DRAG A HEAVY BODY ON A ROUGH HORIZONTAL SURFACE BE n TIMES ITS MAGNITUDE,WHEN IT BE INCLINED TO THE HORIZONTAL AT THE ANGLE OF FRICTION .FIND THE CO-EFFICIENT OF FRICTION. ...

*Image* Is N= mg(cos α+sinα ) f= mg(cosα-sinα) \alpha \leq \frac{\mu -1}{\mu +1} ...

4. A chain of length l is held stretched out on a frictionless horizontal table, with a length x hanging down through a hole in the table. The chain is re- leased. As a function of time, find the length that hangs down throug ...

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*Image* this came in nsep 2007 . ...

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When slightly different weights are placed on the two pans of a beam balance,the beam balance comes to rest at an angle with the horizontal.The beam is supported at a single point P by a pivot (A)The net torque about P due to ...

A glass tube of radius r is dipped vertically into a container of mercury with its lower end at a depth h below the mercury surface. If # is the surface tension of mercury , what must be the gauge pressure of air in the tube ...

A string 120cm in length sustains a standing wave with the points of the string at which the displacement amplitude is equal to 3.5 mm being seperated by 15cm. find, a)the maximum displacement amplitude b)to which overtone do ...

one of the star of a binary(double) stars system is rotating in a circular orbit of radius r1 with time period T. If the mass of this star is m1 find the mass m2 of the other star. Also find the distance between the two stars ...

a rope is pulled by each side in a game of tug of war by applying a force of 200 N.....what is the tension on the rope? *Image* ...

Does Newton's law of motion is applicable for explosion? yes...when..there is no matter of force..instead of there is kinetic energy..but nwton's law does not deal with K.E. stuck. ...

A solid cylinder of mass M=1kg and radius R=0.5m is pivoted at its centre and has three particles of mass m=0.1 kg mounted at its perimeter as shown in figure.The system is originally at rest.Find the angular speed of the cyl ...

A ball of mass M moving with velocity V0 on a frictionless surface strikes the first of two identical balls, each of mass m = 2 kg, connected by a massless spring with spring constant k = 1 kg/s2 (see Figure). Consider the co ...

A motorboat going downstream overcame a raft at a point A,t=60min later it turned back and passed the raft at a distance L=6.0km from the point A .Find the flow velocity assuming the duty of the engine to be constant. ...

a river is flowing from w to e at a speed m units.a man on the south bank of river ,capable of swimming at n units in still water,wants to swim across the river in shortest time.derive the expression to find out the direction ...

1)A lift is going upwards with an acceleration of 4.9 m/s2.Whatv will b the apparent wt. of a 60kg man in the lift?What when the lift rises up with a uniform velocity of 4.9m/s2?If the rope of the lift is broken,then? 2)A mac ...

water drops fall at regular intervals from a roof.at an instant when a drop is about to leave the roof, the seperations between 3 succesive drops below the roof are in the ratio: a)1:2:3 b)1:4:9 c)1:3:5 d)1:5:13 ...

A boat moves relative to water with a velocity which is n(=2) times less than the river flow velocity. At what angle to the stream direction must the boat move to minimize drifting?? ...

*Image* Find the time period of small oscillations of the system composed of two homogenous circular cylinders, each of mass M and the connecting link AB. Assume no slipping on ground. ...