# Recently Active Mechanics Questions

• For rotational collisions we usually conserve angular momentum. (i) But is linear momentum conserved as well? (ii) If the coefficient of restitution is given, how do you calculate the question? Ex. A stick of length L and mas ...
replied2009-02-04 08:59:01
• *Image* ...
replied2009-02-04 07:19:51
• Similar to 1975 problem.......... *Image* ...
replied2009-02-04 02:36:59
• a particle is moving in a circular path of constant tangential acceleration time t after the beginning of motion the direction of net acceleration is at 30Â° to the radius vector at that instant The angular acceleration of th ...
replied2009-02-04 00:17:12
• Guys a big Conceptual Doubt. Have A look. Surface energy is the work done per unit area in the surface against force of surface of tension at constant temp. and surface energy is numerically taken equal to surface tension. Bu ...
replied2009-02-03 06:38:48
• Moment of Inertia of: Ring = mr2 = Hollow Cylinder Disc = mr2/2 =Solid Cylinder Just elongate the ring in the direction of the axis of rotation and you'll get a hollow cylinder. Just elongate the disc in the direction of the ...
replied2009-02-03 00:38:25
• a long horizontal rod has a bead which can slide along its length and initially placed at a distance L from one end A of the rod The rod is set in angular acceleration a' If the coefficient of friction between the rod and the ...
replied2009-02-02 22:11:33
• An organ pipe is in resonance at its fundamental mode with a tuning fork which in turn produces k beats per second with another tuning fork of n Hz.When the organ pipe is dipped in water to one-third of its original length,it ...
replied2009-02-02 19:02:22
• *Image* passage: a rod of mass m n length l is placed vertiaclly on a smooth floor as shown in the fig.. The lower end of the rod is given a negligible slight push towrds left due to which the lower end of the rod moves towar ...
replied2009-02-02 06:26:27
• please explain this statement and also indicate briefly its proof if you can A body floats in a liquid in a vessel which accelerates vertically with an acceleration less than g. the fraction immersed will neither depend on th ...
replied2009-02-01 05:54:13
• The disc of the radius R is confined to roll without slipping at A and B. *Image* If the plates have the velocities shown,determine the angular velocity of the dics ...
replied2009-01-31 08:58:24
• A ladder of length 5m inclined to a vertical wall is slipping over a horizontal surface with velocity of 2m/s when A is at distance 3m from ground.What is the velocity of COM at this moment? *Image* ...
replied2009-01-31 06:05:17
• Q1 What is angular velocity of line AB at the instant shown? Q2 What is angular velocity of B wrt A at the given instant? Q3Prove that [vB/A]â‰ [vA/B] (where [ ] denotes magnitude part) *Image* ...
replied2009-01-30 09:53:40
• The leaning tower pisa is 55mhigh and 7.0m in diameter.The top of the tower is displaced 4.5 m from the vertical.Treating the tower as a uniform,circular cylinder a)wat additional displacement,measured at the top,will bring t ...
replied2009-01-30 07:43:21
• *Image* * light rods *light string(ideal) ...
replied2009-01-30 02:20:04
• topic closed....... ...
• A ball of mass M1=1kg falling vertically with a velocity v0=2m/s;strikes a wedge of mass M=2kg kept on a smooth,horizontal surface as shown in figure.The coefficient of restitution between the ball and the wedgel is e=1/2; Fi ...
replied2009-01-29 20:09:24
• A uniform solid cylinder of radius R=15 cm rolls over a horizontal plane passing into an inclined plane forming an angle Î±=30Â° with the horizontal. Find the maximum value of the velocity vo which still permits the c ...
replied2009-01-29 07:37:02
• Consider a gravity free hall in which an experimenter of mass 50 kg is resting on a 5 kg pillow,8ft above the floor of the hall.He pushes the pillow down so that it starts falling at a speed 8 feet/sec. The pillow makes a per ...
replied2009-01-29 03:33:42
• AN EQUILATERAL TRIANGLE abc formed from auniform wire has two small identical beads initially located at A. THE TRIANGLE IS SET ROTATING about the vertical axis AO. then the beads are realsed from rest simultaneously and allo ...
replied2009-01-28 20:36:53
• *Image* FIND THE DIFFERENCE IN WATER LEVELS IN THE CENTER OF THE TUBE AND THE CORNERS. TUBE IS ROTATED BY ANGULAR VELOCITY Ï‰ AND THE LIQUID HAS DENSITY OF Ï. [1] Each of you must have done this sum atleast a 1000 times, but ...
replied2009-01-28 02:44:56
• *Image* ...
replied2009-01-28 02:43:49
• Two capillary tubes of AB and BC are joined end to end at B. AB is 16cm long and of diameter 4mm. BC is 4cm and of diameter 2mm. The composite tube is held horizontally as in poiseuilli's experiment, with A connect to a v ...
replied2009-01-27 11:04:31
• Moisture condenses at the constant rate l units of mass per unit time on a falling raindrop. If the drop falls from rest and has initial mass M, find the distance it has fallen in time t. Neglect air resistance. ...