Recently Active Mechanics Questions

A particle is moving in a straight line with SHM of amplitude A . At a distance S from the centre of motion, the particle receives a blow in direction of the motion which instantaneously doubles the velocity. The new amplitud ...

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1.A body 'A' is projected upwards with a velocity of 9.8m/s.The second body 'B' is projected upwards with the same initial velocity but after 4 seconds.After how much time will both the bodies meet after the first body is pro ...

What are the types of equilibrium ? If an object's base is inclined to the ground at angle β .. and the dimensions of this object are a , b=base , and c (= longer than a) with volume density = Ω ..find the kind of equilibri ...

In the fig. shown a smooth ring is connected to rod AB while rod CD passes thru ring . At the given instant angular vel. of rod AB abt hinge A is 1 rad/s and AC=CB. Instantaneous angular vel. of rod CD abt hinge C is (A) 1 ra ...

A disk and a rod are hinged together in the following two ways: 1)through a pin joint 2)through welding at the hinge point Given that in the first case the disk rotates with omega1 and rod rotates with omega2 .While in the se ...

A uniform cylindrical pulley of mass M and radius R can freely rotate about the horizontal axis O. The free end of a thread tightly wound on the pulley carries a dead weight A. At a certain angle α it counter balances a poin ...

1. A stream of water issuing out from a top "neck down" as it falls. As the falling water crosses two levels separated by a vertical distance 'h', the cross sectional area of water decreases from a0 to a. Find the rate of flo ...

25. A rod of length L is held vertically on a smooth horizontal surface. The top end of the rod is given a gentle push. At a certain instant of time, when the rod makes an angle ∂ with horizontal the velocity of COM of the ...

a particle of unit mass is projected with velocity u at an inclination α above the horizon in a medium whose resistance is k times the velocity. its direction will again make the angle α with the horizon after a time......? ...

A particle of mass m is placed on vertical fixed circular track and then it is given velocity v vertically downward at top most posn. on track . If block moves on track with constant speed then what is work done from top most ...

which force is used to pull the pressure in vacuum cleaner? ...

An ice cube of side l=20cm is floating in a tank (base area=50cmx50cm) partially filled with water.Dendity of water is 1000kg/m^3 and that of ice is 900kg/.m^3 .Calculate the increase in gravitational potential energy when ic ...

A. *Image* Then: (One or more may be correct) 1.) T = 5 N 2.) T = 10 N 3.) T' = 5 N 4.) T' = 0 B. *Image* Weight of sphere = W and a force P is applied on its surface to attain equilibrium (Friction is present). Then 1. Pmin ...

a particle moves on the path y= sinx with constant speed u. what will be its acceleration at x= π/2 ...

A particle of mass m collides oblically with another particle of mass 2m initially at rest. Both the particles have same diameter at the instant of collision velocity of 1st particle is making an angle of pie/3 with the line ...

hey friends i 've a doubt in HCV Newton laws of motion in "Questions for short answers" section...... i m sorry but image uploading is not working on the system.... Q. no. 8; fig 5-Q1 th equestion is the figure which is depic ...

An elevator which can carry a maximum load of 1800 kg(elevator + passengers) is moving up with a constant speed of 2m/s.The frictional force opposing the motion is 4000 N.Determine the minimum power delivered by the motor to ...

*Image* A uniform solid sphere of mass m and radius R is kept on a long plank which is moving with acc. a= kt2 , where k = 1 m/s4 and t is time in seconds . There is no slipping b/w sphere and plank . The minimum value of coe ...

When an automobile moving with a speed of 36km/hr reaches an upward inclined road of angle 300,its engine is switched off.If the coefficient of friction involved is 0.1,how far will the automobile move up the incline before c ...

2 particles in air are in projectile motion having masses M1 and M2 and velocity v1 and v2 at t=t0; collide at t=t1 ; their velocity becomes v1' and v2' at t=2t1, then [(M1v1' - M2v2') - (M1v1 - M2v2)] is ???? ...

A cubical block is to be constructed with iron sheets 1mm in thickness. What can be the minimum value of the external edge so that the cube doesnt sink in water? Density of iron=8000kg/m3 and density of water=1000kg/m3 I solv ...

*Image* Q1 & Q2 floor is smooth.Q2 surface below top bloc is smooth. ...

Anyone can please tell what is it and where and how to use it? ...

Two touching bars 1 and 2 are placed on an inclined plane forming an angle α with the horizontal. The masses of the bars are equal to m1 and m2, and the coefficients of friction between the inclined plane and these bars are ...

A wheel of radius R rolls without slipping with a speed v on a horiz road. When it is at a pt. A on the road , a small mud particle separates frm the wheel at its highest pt. and lands at pt. B on the road . Then (A) AB = v(R ...

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is the topic INSTANTANEOUS AXIS OF ROTATION in JEE syllabus?? ...

since the part tests must be coming now..i guess the first part test must be having mechanics in it this question had come in my fiitjee aits (or might be some phase test) *Image* there is a smooth rod(friction is absent on i ...

Two wheels of same masses M and radii R are joined coaxially so that the system can perform rolling motion on the ground.The system is released from the top of the inclined plane of inclination theta and height H.The system p ...