# Recently Active Mechanics Questions

• Q. A block of weight 100 N is slowly slid up on a smooth incline of inclination 37Â° by a person. Calculate the work done by the person in moving the block through a distance of 2.0 m , if the driving force is (a) parallel to ...
replied2008-12-07 00:38:01
• Q. A box weighing 2000 N is to be slowly slid through 20 m on a straight track having friction coefficient 0.2 with the box. (a) Find the work done by the person pulling the box with a chain at an angle Î¸ with the horizontal ...
replied2008-12-07 00:34:55
• a ball is dropped wid negligible velcity on a floors of a lift which is accelerating upwards the e=1 when the ball strikes the floor 8:40 PM assertion the ball will reach to the same heigh[in earths frame..] reason:when a ...
replied2008-12-06 04:32:19
• SUM 1::: a particle is projected at a speed u at anangle thita{-} wid the horizonatal consider a small part near the highest position and take it to b a approx circular arc Wht is d radius of this circle....??? ...
replied2008-12-03 21:18:12
• wht is reduced mass concept???where is it used??n how is it used??plz explain.,.. ...
replied2008-12-03 20:59:52
• A BLOCK OF MASS 2kg is pushed against a rough vertical wall with a force of 40N..coefficient of static fricion being 0.5. Another horizontal force of 15N ,is applied on the block in a direction parallel to the wall. Will the ...
replied2008-12-03 19:33:31
• *Image* a rod is aligned at a corner as in figure. no friction is there anywhere. it start to slide. prove that it would leave the vertical wall when it's tip is at a height 1/3rd of initial. edit:: the actual question as ...
replied2008-12-02 09:38:48
• a rod of mass M n lenght L is standing in vertical position,it is pushed with infinitimesly small force ,n fall down in a quarter circle without displacing its lower end then wat is the normal reaction when is at horizontal p ...
replied2008-12-02 04:58:38
• *Image* The Figure shows two rods BC and OA hinged from B and O respectively. Rod BC has a groove in which A of rod OA can slide smoothly. At a given instant,the rod BC has an angular velocity Ï‰. The speed of end A of the ro ...
replied2008-12-02 03:01:51
• a weight with a mass `m` is attached to the end of a string with a length of length `l` fastened to a vertical rod rtating with a angular velocity `Ï‰`.another string of the same length as the first and carrying on its end an ...
replied2008-12-01 19:48:27
• *Image* a spool with thread wound on it, of mass 'm', rests on a rough horizontal surface. its moment of inertia relative to it sown axis is equal to I=Î³mR2 , where Î³ is a numerical factor, and R is the outside ...
replied2008-12-01 04:48:57
• a particle is acted by force of constant magnitude whiich is always perpendicular to velocity of particle . the motion of the particle takes place in plane. it follws that: (a)velocity constant (b acceleration constant (c)K.E ...
replied2008-11-29 09:40:33
• a ball of mass 0.2kg is thrown vertically upward by applying a force by hand. if the hand move 0.2 metre above while applying the force and bal;l goes to distance 2. find f ...
replied2008-11-29 07:16:54
• I personally dont like pseudo force.. (Used to love it when I was in class xi) but when i came to class xii.. i started to hate it.. Yeah there are some problems which are solved in a flash by using pseudo force.. but there a ...
replied2008-11-28 05:12:24
• why tuning fork can form resonance only with closed pipe and not with open pipe?? ...
replied2008-11-26 14:26:10
• One end of a spring of unstretched length L and force constant k is fixed to a pivot, and a body of mass m is attached to its other end The spring is released from an unstretched, horizontal position, as shown in figure What ...
replied2008-11-26 14:18:34
• *Image* threads of lengths h1 ,h2 and h3 are fastened to the vertices of a homogenous triangular plate of weight W The other ends are fastened to a common point,as shown in the figure What is the tension in each thread, expre ...
replied2008-11-26 00:07:40
• a glass capillary tube with an internal diameter of 0.5 mmis immersed into water.the top end of the tube projects by 2cm zbove the surface of the water.what is the shape of the miniscus? ...
replied2008-11-24 06:33:23
• *Image* This is a really easy question if you can grasp the concept within A small hamster is put into a circular wheel-cage which has a frictionless central pivot,A horizontal platform is fixed to the wheel below the pivot.I ...
replied2008-11-24 03:21:26
• two Ice skaters ram n lakhsman [hehe ...nice names] are holding two sides of a massless rod ......ram is twice as heavy as lakshman.....the centre of mass of the two skaters lie along the rod.... where will they meet:: 1.if r ...
replied2008-11-22 06:19:10
• a sphere is rolling up an inclinced plane..... and thn returns rolling... wot is the direction of friction in both the cases?????????? ...
replied2008-11-20 21:36:24
• generally they say that moment of inertia cannot be more than MR*2.but there is a case where it can be greater than MR*2.can anyone describe one such case? nishant bhai please dont answer this. ...
replied2008-11-20 07:16:08
• Asked by nirav Nirav Is it possible to find the displacement on the ground that a projectile will undergo after reaching back to ground with following parameters? angle = 89 degrees initial velocity = say 50 m/s t ...
replied2008-11-20 03:03:08
• DO xplain in detail. as in (i)on d surface of earth (ii)r<R (iii)r>R ...
replied2008-11-19 23:02:32
• if earth is taken 2 b a solid sphere and a tunnel is dug along d diameter of d earth and a body is thrown in d tunnel then how is d body going 2 show s.h.m? d thing is i know by time period formula dat can b proved. bt i ...
replied2008-11-18 08:09:52
• Find mu for the rod of mass m to be in equilibrium. Both blocks are fixed. *Image* ...
replied2008-11-18 07:54:06
• a light rod of length 1m is pivoted at its centre and two masses r attached as shown...find initial ang acc assuming the rod was initially horizontal..... *Image* why there is no torque due to tension??? ...
replied2008-11-16 18:20:24
• A simple harmonic oscillator of force constant k oscillates with amplitude in a frictionless medium.Answer the following ques: 1) The position average kinetic enrgy per oscillation is_? 2) The time average potential energ ...
replied2008-11-16 08:02:05
• in triangle abc,Î”2=a2b2c2/2(a2+b2+c2)then which type triangle is abc right angel, equilateral,isoscelesor scalene ...
replied2008-11-14 19:29:48
• A thin uniform rod of mass m has one end attached to a smooth hinge and is allowed to fall down from a horizontal position.Find the max. horizontal strain on the hinge during rotation of rod. ...
replied2008-11-13 22:44:09