# Recently Active Mechanics Questions

• Explain the Process and what should be the correct answer and why? *Image* ...
replied2012-05-16 23:35:38
• A balloon starts rising from the earth's surface.The ascension rate is constant and equal to vo.Due to the wind,the balloon gathers the horizontal velocity component vx=ky,where k is a constant and y is the height of ascent.F ...
replied2012-05-16 23:01:36
• A+B=C and A+B=C .Find the angle between A and B. Note-A,B,C are vectors and A,B and C are their respective magnitudes. ...
replied2012-05-10 23:10:43
• The sum of two vectors A and B is at right angles to their difference.Then (a)A=B (b)A=2B (c)B=2A (d)A and B have the same direction ...
replied2012-05-10 03:45:49
• Four forces of magnitude P,2P,3P and 4P act along the four sides of square ABCD in cyclic order.Use the vector method to find the resultant force. ...
replied2012-05-08 03:25:43
• Raindrops are falling with a speed of 5 m s -1 at an angle of 37Â° with the vertical. A man is climbing down a plane of inclination 30Â° with the horizontal, holding the umbrella vertically up to protect himself. Find the spe ...
replied2012-04-28 09:46:23
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replied2012-04-24 00:30:55
• Q. A slightly conical wire of length L and end radii r1 and r2 is stretched by two forces F, F applied parallel to length in opposite directions and normal to end faces. If Y denotes the Young's modulus, then extension produc ...
replied2012-04-17 08:30:42
• A 40 kg. mass hanging at the end of rope of length 'l' oscillates in a vertical plane with an angular amplitude 'x'. What is the tension in the rope , when it makes an angle 'y' with the vertical? If the breaking strength of ...
replied2012-04-16 06:44:20
• A particle slides from the top down the outside smooth surface of a fixed sphere of radius 'R'. When the particle is at its highest position, what velocity in the horizontal direction should be imparted to it , so that it lea ...
replied2012-04-16 00:06:59
• Two bobs of masses 6m and 10m are attached to the two ends of a light inextensible string which passes over a frictionless ring at O. The lighter bob describes a horizontal circle about the heavier bob(which remains stationar ...
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replied2012-04-14 18:50:39
• Hi all, get relevant and useful flash animations in physics at http://www.mksfoundation.com/flashlets.aspx and lot of other free stuff for JEE preparation at this site. ...
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replied2012-04-10 09:35:41
• *Image* The figure shows mass m moves with velocity u. Ring is restricted to move on smooth fixed horizontal rod. Velocity of the ring at that moment? I thought the answer to be u/2 but the correct answer is 2u. This can happ ...
replied2012-04-07 22:55:49
replied2012-04-06 10:31:43
• *Image* For second, Options B,D are same. And those contain the answer I think For Third, Someone verify. I think it should be C ...
replied2012-04-06 02:05:55
• Q.Find the minimum radius of a planet of density rho temperature T which can retain oxygen in it's atmosphere.The mass of oxygen is M and the acceleration due to gravity is g m/s^2. Ans-:sqrt[(9RT)/8*G*m*rho*pie] here i get t ...
replied2012-04-06 01:16:19
• The shape of a water clock jar is such that water level. Descends at constant rate at all times.is it falls by x m/s,shape of jar is given by y proportional to x^n find value of n if radius of drain hole is r and can be assum ...
replied2012-04-02 12:05:13
• Which of these does not associates with a black body : a) It absorbs radiation b) It emits radiation c) It refracts radiation d) It reflects radiation. I don't remember the question correctly. So Excuse for the language. ...
replied2012-04-02 11:54:56
• 1. A block A of mass m is placed over a plank B of mass 2m. The friction between them is .5 while the ground surface is smooth. The upper block A is imparted a velocity V towards right. The acceleration of B relative to A wil ...
replied2012-04-02 10:16:13
• *Image* *Image* The figure shows mass m moves with velocity u. Ring is restricted to move on smooth fixed horizontal rod. Velocity of the ring at that moment? I thought the answer to be u/2 but the correct answer is 2u. This ...
replied2012-04-02 10:14:59
• A point object moves on a circular path such that distance covered by it is given by S=t^2/2 +2t meter(t in seconds) .ratio of magnitude of acceleration at t=2 and t=5s is 1:2 .then radius of circle is? Ans 3âˆš51 Please expl ...
replied2012-04-02 03:27:52
• Q. A rod is placed tilted like a ladder is placed having its contact with ground as well as with the perpendicular wall. the rod is making an angle 37Â° with the horizontal. If the end touching the ground of the rod is being ...
replied2012-04-01 09:47:01
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replied2012-03-31 04:33:57
• A uniform rod of length 27 m is rotating through one end through a fixed axis perpendicular to rod.ratio of angular and linear momentum? Options: 3,9,18,27 My answer is 9 but correct one is 18 which comes if we take MV=MWL/2 ...
replied2012-03-30 23:52:00
• if a particle covers half of distance with 30m/s. Then what should be the velocity of particle at other half distance,so that its average velocity will be 60m/s. ...
replied2012-03-28 21:52:11
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replied2012-03-27 06:54:55
• *Image* specifics ; radius = 5 cm u (coeff) = 0.8 ...
replied2012-03-25 22:49:23
• I.184 A chain AB of length l is located in a smooth horizontal tube so that its fraction of length h hangs freeely and toches the surface of the table with End B. At a certain moment the end A of the chain is set free. With w ...
replied2012-03-25 08:11:35