Recently Active Mechanics Questions

A spherical small ball of density p is gently released in a liquid of density ∂ (p > ∂ ) . The initial acceleration of the free fall of the ball will be : a) p + ∂/p g b) p - ∂/∂ g c) p - ∂/p g d)g the answer g ...

A piece of ice with a stione frozen inside it is floating in water contained in a beaker. When the ice melts the level of water in a beaker a)rises b)falls c)remains unchanged d)falls at first then to the same height as befor ...

A cube of ice is floating in a liquid of relative density 1.25 contained in a beaker. When the ice melts , the level of the liquid in the beaker A)rises b)falls c) remains unchanged d)falls at first and then rises to the same ...

Q: A light rod is placed on a smooth horizontal surface . Initially , the end A begins to move vertically upward with constant velocity v0 and centre of the rod upward with a velocity v0/2 having downward acceleration a0/2 , ...

*Image* Ideal fluid flows along a flat tube of constant cross-section, located in a horizontal plane and bent as shown( in figure is the top view ) . The flow is steady. Are the pressures and velocities of the fluid equal at ...

*Image* take that a fluiid is present upto the brim....and there is asmall orifice as shown.....find y such that range of the fluid that comes out of the orifice is max.. ...

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A plateau is in the shape of a trapezium with the upper surface horizontal and the side surfaces at 60° & 30° to the horizontal.A man walks up the steeper slope at 6 m/s then along the upper surface and then down the inclin ...

The horizontal bottom of a wide vessel with an ideal fluid has a round orifice of radius R1 over which a round closed cylinder is mounted, whose radius R2>R1( see the figure ) . The clearance between the cylinder and the b ...

A cylinder partitioned into two parts is filled with two immiscible liquids A(ρ1) and B(ρ2).Now two orifices(O1 and O2) are simultanously created.Find velocity of efflux Take two cases a)ρ1>ρ2 b)ρ1<ρ2 *Image* ...

Is this question of IIT JEE / AIEEE STANDARD OR LESS ? ...PLEASE SOLVE IT..IT SEEMS EASY..BUT I THINK IT IS NOT.. Q: If the greatest admissible acceleration or retardation of a train be 3 feet/sec2 , find the least time from ...

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If a rigid body is rotating about an axis passing through the point 2i -j - k and parallel to i-2j+2k with an angular velocity = 3 rad/sec , then find velocity of the point whose position vector is 2i + 3j - 4k : [01] -2i+ 3j ...

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Q1-in pure rolling of a sphere of radius r on rough horizontal surface if angular acceleration a2 and linear acceleration a1 are related as a1=r*a2. then a-frction force act in direction of rolling b-friction force act in dir ...

An aeroplane has to go from a point A to another point B,500 km away due 30° east of north .wind blowing due north at as speed of 20m/s.The air-speed of the plane is 150m/s.(a)Find the direction in which the pilot should hea ...

consider a plane progressive wave y=A sin(kx-wt) propagating in a string having tension F. What is the linear impulse given by the F-transverse acting at x=0 on the time interval t=0 to t= T/4? (asumptions tanθ≈sinθ; Ampl ...

*Image* Ans : mL2 ...

*Image* *Image* where am i making the mistake???? the second solution is given in the book!! where am i wrong in my solution(1st one).....?? ...

*Image* I need ans to Q2,3 only ...

Q1 *Image* Q2 only ans plz for this one *Image* ...

A smooth sphere of mass m impinges on another of mass M at rest, the direction of motion making angle 45° with the line of centers at the moment of impact. If the coeffcient of restitution e = 1/2, show that direction of m i ...

*Image* The length of rod is 'L' .What is acceleration of the rod and tension in the string just after the one of the string is snapped. ...

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In the situation shown in the figure for whAT value of force F sliding between middle and lower block will start *Image* ...

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Q1 if v' is frequncy of photon which escapes to ∞ from a star and v is its freuncy when it is emmited from surface of star of radius R then v/v'= ? Q2Gravitational red shift of phototn escaped to ∞ from starts surface is ...

Q1An object of mass m is located at radius r form centre of black hole with Schwarzschild radius Rc.Find attractive force exerted by black hole on body Q2 Astronomers observed a small massive object at centre of our milky way ...

Sorry for double post....plz reply here http://targetiit.com/iit-jee-forum/posts/no-idea-part3-15384.html ...