# Recently Active Mechanics Questions

• A trolly full of sand is moving with velocity V0 there is a hole at the bottom with which sand drops out velocity of trolly will a) increase b) decrease c) remain same ...
replied2009-01-23 00:14:45
• there is a rod of length 5 m. it is leaning or inlcined to a wall with one end on ground and upper end on the wall! it makes angle 37* with tthe ground! below end is given velocity 3m in horizontal direction! find. velocity o ...
replied2009-01-22 23:43:18
• A triangular plate is hung such that it is in the horizontal plane..we use 3 threads and tie them to one of the vertices each and the other to the roof let the tensions be T1,T2,T3 and the lengths of the sides opposite to the ...
replied2009-01-22 23:40:30
• PLease try out que 6 guyssss *Image* ...
replied2009-01-22 09:54:27
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replied2009-01-21 23:29:07
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replied2009-01-21 05:09:17
• a point moves in the x-y plane according to the relation x=a sin wt and y=a(1-cos wt) The distance travelled by a point during time T is Please give solution ...
replied2009-01-21 04:51:26
• wat is difference in gravitational mass & inertial mass ...
replied2009-01-21 02:42:03
• A uniform rod of mass m and length l rests on a smooth horizontal surface.One of the ends of the rod is struck in horizontal direction at right angles to the rod.As a result the rod attains a velocity v.Find the force with wh ...
replied2009-01-19 05:04:01
• - Mechanical energy is the sum of potential & kinetic energy. - Potential energy can be due to gravitation or in other forms like an extended or compressed spring. - The formula, that the potential energy of a body at a heigh ...
replied2009-01-19 03:11:13
• in an inverted cone (of height h) a particle is kept on its curved surface at height h/2 & given a velocity v tangentially .if the particle comes out in a parabolic path with max height attaned =h/2 then find v? ...
replied2009-01-18 23:15:20
• 2 equal smooth spheres of radius r move with same speed in opp directions along parallel lines at a distance c apart. (c<2r). PRove that motion of each deviates through right angle if c2-(1+e)=rer2 where e is coeff of ...
replied2009-01-18 11:07:51
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replied2009-01-17 10:50:23
• *Image* when a heavy rope is hanging from its supports as shown in figure what is the tension in the middle of the string ...
replied2009-01-17 08:24:02
• A particle of mass 2m is projected at an angle of 45 degree with the horizontal with a velocity of 20 2 m/s. After 1 sec, explosion takes place and the particle is broken into two equal pieces. As a result of explosion one pa ...
replied2009-01-16 19:58:43
• what is coefficient of restitution ...
replied2009-01-16 19:06:51
• A uniform chain of length L and mass M is hanging vertically from its ends A and B which are close together.At a given instant the ened B is released.Find the tension at A when B has fallen a distance x(<l) *Image* ...
replied2009-01-16 18:55:26
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replied2009-01-15 21:36:58
• A locomotive approaching a crossing at a speed of 80 miles per hr sounds a vessel of frequency 400 Hz.When 1 mile frm d crossing there's no wind and the speed of sound in air is 0.2mile per sec.What frequency is heard by an o ...
replied2009-01-15 07:32:44
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replied2009-01-15 05:38:34
• A trolley of mass M placed on a smooth floor, carries two persons each of mass m at the edge.Given velocity of trolley after both men jump off the trolley simultaneously is Va and if they jump one after the other it is Vb(bot ...
replied2009-01-15 05:27:28
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replied2009-01-15 05:04:02
• *Image* in the arrangement shown, the ends P & Q of an unstrecthable string move downwards with uniform speed U. pulleys A & B are fixed. find the speed with which mass M moves upwards ? ...
replied2009-01-15 02:25:46
• a projectile will cover the maximum vertical distance in the minimum time when the angle of its projection with the horizontal is i know the ans is 45Â° but i am not able to prove it ...
replied2009-01-13 20:42:19
• a car 2m long and 3m wide is moving at 10m/s when a bullet hits it in a direction making an angle of inv.tan(3/4) with the car as seen from the ground The bullet enters one edge of the car at the corner and passes out at diag ...
replied2009-01-13 19:34:30
• *Image* HEy.. RAjnikanth is back.. His new challenge is to kill the villian on the other side of the glass wall.. He has 2 guns. The wall is 50m high(i dont know why he cant jump that high LOL). So he first throws a gun(G1) a ...
replied2009-01-12 22:31:20
• a strip of wood of mass M and length l is placed on a horizontal ground A rat of mass m starts from one end of the strip and reaches the other end in time t1 It then jumps off vertically The strip moves a further distance l i ...
replied2009-01-12 08:42:21
• There are two air bubbles (fully submerged) inside a container filled with water. Considering only gravitational force, explain whether they will get attracted or repelled. (Surface tension, etc not to be considered...only gr ...
replied2009-01-12 08:29:16
• Two cars are driving on the road with velocity v.One of them accelerates to 2v.In the Earths reference frame its kinetic energy has changed to 3mv2/2. In the frame of the second car, its energy has changed by mv2/2.The amount ...