# Recently Active Mechanics Questions

• *Image* KEY WORD : PRESSURE NODE ( YEH KYA HOTA HE???) ...
replied2009-03-07 22:03:12
• Help Jack!! Some Jack's physics and see how it helps him escape the flying Duchman :P Q.1 Jack is on the top of a mast(10 m high see level) of his Black Pearl and sees the flying Duchman (point sized :P) at a distance of ...
replied2009-03-06 02:19:26
• What is the phase difference, at a given instant of time, between two particles 25 m apart, when the wave y (x, t) = 0.03 sin (2t - 0.01x) travels in a medium ? ...
replied2009-03-04 09:35:38
• Two organ pipes, each closed at one end, give 5 beats per second when emitting their fundamental notes. If their lengths are in the ratio of 50 : 51, their fundamental frequencies (in Hz) are? ...
replied2009-03-04 09:15:37
• *Image* Paragraph for Questions numbers 14 to 16 : Mass of a string varies with its length as m = 0.1L where m is in kg and L is in cm. A block of mass 5kg is hanging to its lower end. A force F = 12 N acts on the block in ve ...
replied2009-03-04 06:58:12
• *Image* two particles A and B of the same mass are joined by a light string and placed on a horizontal surface. An external horizontal force P acts on A. the tension in the string is T. the force of friction acting on A and B ...
replied2009-03-04 06:24:07
• *Image* what will be the extension of the spring? ...
replied2009-03-03 22:43:09
• *Image* Paragraph for Questions numbers 14 to 16 : Mass of a string varies with its length as m = 0.1L where m is in kg and L is in cm. A block of mass 5kg is hanging to its lower end. A force F = 12 N acts on the block in ve ...
replied2009-03-03 21:06:02
• Can transverse (material)wave travel in air.. why/why not ...
replied2009-03-03 09:42:21
• A charge particle X moves directly towards another charged particle Y. for the â€˜X and Yâ€™ system, the total moment is â€˜pâ€™ and the total energy is â€˜Eâ€™. a) p and E are conserved if both X and Y are free to move. b) ( ...
replied2009-03-03 06:58:09
• In a 1-dimensional collision between two particles, their relative velocity is v1 , before the collision and v2 after the collision. a) v1=v2 if the collision is elastic. b) v1= -v2 if the coll is elastic. c) |v1| = |v2| in a ...
replied2009-03-03 06:44:02
• *Image* my confusion is one thing: why should the horizontal forces cancel each other?? even if the man has a horizontal acc, it has no space to move!! do answer.. otherwise no other prob with the question... (sorry for the s ...
replied2009-03-03 04:59:36
• rotational *Image* find omega//... Ï‰ there is ground wid frictions..no slipping......the block keeps horizontal always..... ...
replied2009-03-02 22:26:06
• *Image* ...
replied2009-03-02 17:18:08
• a block of weight 9.8 N is placed on a table. the table surface exerts an upward force of 10N on the block. assume g=9.8 m/s2. a) block exerts a force of 10N on the table. b) block exerts a force of 19.8N on the table. c) blo ...
replied2009-03-02 15:14:09
• do them if u feel to do .. syllabus blabla bla math lao yaha 1]Two beads of mass m are positioned at the top of a frictionless hoop of mass M andradius R, which stands vertically on the ground. The beads are given tiny kicks, ...
replied2009-03-02 04:50:58
• OKIE HERES A GUD 1 ......................... A PENDULUM HAS A MASSLESS THEAD (long) ATTACHED TO A HOLLOW METAL SPHERE FILLED WITH WATER......... A SMALL HOLE IS MADE I THE BOTTOM MOST PART OF THE HOLLOW SHPERE WHILE THE PENDU ...
replied2009-03-02 04:44:38
• A solid sphere of mass 2.5kg and radius 20cm, placed on a horizontal smooth ground is acted upon by an impulse of 50 Ï€ Ns at a point A as shown in fig. The number of rotations made by the sphere about its diameter before hit ...
replied2009-03-02 00:28:08
• *Image* SOLUTION : 39 (d) y = Ï‰2r2/2g , measured from the axis of the parabola. CAN sum1 pl. help me decipher, 1) how did this expression cum ??? [7] 2) wats the parabola, wich is being talked abt?? ...
replied2009-02-28 23:27:14
• 34 . A strip of wood of length l is placed on a smooth horizontal surface . An insect starts from one end of the strip , walks with a constant velocity and reaches the other end in time t1 . it then flies off vertically . The ...
replied2009-02-28 18:18:56
• *Image* ...
replied2009-02-28 09:57:34
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replied2009-02-28 08:21:57
• *Image* a particle of mass 'm' moving with velocity 'u' makes an elastic one-dimensional collision with a stationary particle of mass 'm' . they are in contact for a very brief time T. their force of interaction increases fro ...
replied2009-02-28 07:52:05
• CONSIDER A PARTICLE MOVING IN SHM ACCORDING TO EQUATION x=2cos(50Ï€t+tan-10.75) x is in cdentimetre n t is in second motion starts at t=0 (A) WHEN DOES THE PARTICLE COMES AT REST FOR THE FIRST TIME? (B) WHEN DOES THE PARTICLE ...
replied2009-02-28 06:43:04
• A spotlight S rotates in a horizontal plane with a constant angular velocity of 0.1 rad/sec. The spot P of lights moves along a horizontal wall at a distance of 3m. The velocity of the spot P when A=45Â° is___________________ ...
replied2009-02-28 03:46:57
• Two glass plates having a little of water in between cannot be easily separated because a)atmospheric pressure b)surface tension ...
replied2009-02-27 20:22:43
• assertion: A hydrogen filled balloon stops rising after it has attained a certain height in the skyÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â reason: the atmospheric pressure decreases with height ...
replied2009-02-27 17:42:18
• *Image* this is how i remember it.........(may not be same) starts off pure rollin with given parameters(figure) and when spring is unstreched!!!! a)find freq. b)max diplacement c)max. value of vo for which it rolls 1 day up ...
replied2009-02-26 21:32:32
• the angular amplitudeof a simple pendulum is (theta)0 The maximum tension in the string will beÂ Â Â Â a)mg(1+(theta)o2)Â Â Â Â Â Â Â Â Â b)mg(1-(theta)o2)Â Â Â Â Â Â Â Â Â Â c)mg (1+(theta)o)Â Â Â Â Â Â Â Â Â Â Â Â Â d)mg(1- ...
replied2009-02-26 19:46:27
• a particle of mass m rotates in a circle of radius a with uniform angular speed w It is viewed from a frame rotating about z-axis with a uniform angular speed wo The centrifugal force on the particle is ...
replied2009-02-26 19:15:14