Recently Active Mechanics Questions

*Image* for what height h of water in vertical cylinder will the piston be in equilibrium? a)r b)2r c)r/2 d)r/3 ...

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*Image* two stones... bigger one of mass' M' n smaller one of mass 'm' is dropped from a height 'h' ... afetr coming in contact with d ground d stones bounce back.. the cofficeint of restitution between d two stones 'E' is eq ...

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i was solving irodov kinematics and found that even after reading theory carefully there r some minue concepts that i tend to forget like v=wr where v is the speed of the object and i get aware of my misconcetion while solvin ...

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its a basic question from kinematics which has cinfused me a particle completes half a circle of radius 160cm in the time interval 10s. Calculate the following quantites averaged over the whole time interval. the mean veloict ...

i was solving this classical sum from irodov a chain is tied to a thread such that the lower portion just touche the upper part of the table. now the thread is burnt prove that the force exerted by the falling part is twice o ...

*Image* A straight tunnel is dug into the earth as shown in fig. at a dist. b from its centre. A ball of mass m is dropped from one of its ends. The time it takes to reach the other end is : a. 42 mins. b. 84 mins. c. 84( b/R ...

Q1 torque T on a body about a given point is found top be equal to C x L where C is a constant vector and L is angular momentum of body abt that point. Choose correct statements a) L doesnt change with time b) dL/dt is perpen ...

1.find angular momentum of spool at time t about bottom of spool *Image* Ans. (r+R)t2 ...

A 1.5 kg block is kept stationary on a horizontal surface.A force f= 4 - x2 starts acting on it on the COM in the horizontal direction.the max K.E of the block between 0<=x<=2m is(where <= denotes greater than or equ ...

Q) A particle is moving in a circle of radius R, such that at every instant the magnitudes of the instananeous accn and the radial accn are equal. If vel. of the particle be v0 at time t=0, find the time reqd for the completi ...

the speed of a particle moving in a circle of radius=2m is given by v= t2+4 .find the radial and tangential acceleration of the particle ...

1) A:potential at a point in induced elec field is not defined R:induced electric field lines are always closed and hence work done on pt. charge by elec. field in round trip wont be zero 2) A:work done by constant force is i ...

A BLOCK OF MASS M IS SUSPENDED THROUGH A SPRING OF SPRING CONSTANT K AND IS IN EQUILIBRIUM.A SHARP BLOW GIVES THE BLOCK AN INITIAL DOWNWARD VELOCITY V.HOW FAR BELOW THE EQUILIBRIUM POSITION THE BLOCK COMES TO AN INSTANTANEOUS ...

A wave disturbance in a medium is described as ----- y(x,t) = 0.02cos(50pi.t + pi/2)cos(10pi.x)--- A) A node occurs at x = 0.15m B) An antinode occurs at x = 0.3m C) The speed wave is 5 m/s D) The wavelength is 0.3m ...

a manometer reads the pressure of a gas in an enclosure as shown in (a).When some of the gas is removed by a pump,the manometer reads as in (b).the liquid used is mercury and atm pressure is 76 cm of mercury. 1) find the abso ...

Statement 1: Two particles are projected towards each other from a very large distance along the line joining them on a smooth frictionless surface. Their speeds may decrease as they approach each other. Statement 2: The net ...

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If position of a particle varies with time as x = t^3 - 3t^2, whre t is in second. Then magnitude of displacement is equal to distance traveled of the particle at t=???? ...

Will there be any impulse if the angular momentum changes??? ...

*Image* the marked pulley has mass and is going down with a=13...now please write the equations relating the acceleration of various masses and the pulley!!!! ...

got this question frm goiit.com but din get its solution....pls temme the approach to such problems Q-A boy throws a ball upwards with a velocity 20m/s.The wind imparts a horizontal acc. of 4 m/s^2 to the left.The angle @ at ...

A rope with length L and mass density σ kg/m hangs over a massless pulley. Initially, the ends of the rope are a distance x0 above and below their average position. The rope is given an initial speed. If you want the rope to ...

*Image* HOW TO GET THE ACCELERATION OF WEDGE "M"?? ASSUME ALL SURFACES FRICTIONLESS ...

in a gamma decay process, the internal energy of a nucleus of mass M decreases, a gamma photon of energy E and linear momentum E/c is emitted and the nucleus recoils Find the decrease in internal energy ...

A nucleus moving wid a vel. v emits @(alpha) particle .Let the velocities of the @ particle nd the remaining nucleus be v1 nd v2 nd their massess be m1 nd m2 .... (A)v,v1 nd v2 must be parallell to each other... (B)none of th ...

multiple choice... Q..A car of mass M is moving on a horizontal circular path of radius r.At an instant its speed is v & is increasing at the rate a............. (a)the acceleration of the car is towrds d centre of the path.. ...