Unanswered Mechanics Questions

wat is surface tension is it netforce acting per unit length can u please show me the force acting on a thin blade when placed it on the surface of the water please explain the excess pressure inside the air bubble and an air ...

A small disc A is placed on an inclined plane forming an angle α with the horizontal and is imparted an initial velocity v0.Find how the velocity of the disc depends on the angle φ if the friction coefficient k=tanα. a ...

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 ...

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. ...

topic closed....... ...

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the line of action of the resultant of two like parallel forces shifts by one-fourth of the distance between the forces when the two forces are interchanged The ratio of the two forces ...

a uniform rod pivoted at its upper end hangs vertically It is displaced through an angle of 60° and then released Find the magnitude of force acting on a particle of mass dm at the tip of the rod when the rod makes an angle ...

the length of the day from today when the sun is directly overhead till tomorrow again when the sun is directly overhead can be determined by revolution of earth around the sun Please explain how is it correct ...

1) a drop of water of mass 0.2 g is placed between two glass plates The distance between them is 0.01 cm Find the force of attraction between the plates if surface tension of water =0.07N/m-1 2)If p is the pressure of a gas i ...

In nonstretchable strings mechanical waves are always transverse , that too when the the string is under tension .Explain why?? I am sorry if i have posted this question in "mechanics" !! i don't know where to post the waves ...

*Image* A block is plzced as shown in the figure.What must be the frictional force between block and incline if the block is not to slide along the incline when the incline is accelerating to the right at 3m/s2 (sin37°=3/5)? ...

What is the significance of coefficient of friction??? ...

*Image* Two unequal masses of 1kg and 2kg are connected by a strng going over a clampe light smooth pulley as shown in figure.The system is released from rest .The larger mass is stopped for a moment 1s after the system is se ...

Pls state with reason whether work done is pos,neg. or 0 in each case. 2 teams r playing tug-of war.. a. work done by the winning team on the losing team. b. work done by both losing team on the winnig team c. work done by th ...

SOLVE HCV-1 PG-115 Q.19(C) ...

in HCV(circular) exercise q.no.23 why don we take tension on the kids ...

a mass lying on an inclined plane of inclination θ is connected to an equal mass ,hanging vertically ,through a massless string , passing over a frictionless pulley. find the limits of θ, in terms of angle of friction β fo ...

a stone is dropped into a well 80m deep & impact of sound is heard after 4.25 s if g=10m/s2 d vel of sound in air is ...

a stone is dropped into a well 80m deep & impact of sound is heard after 4.25 s if g=10m/s2 d vel of sound in air is ...

two block a and b ,each having amass of 320g connected by a light string passing over a smooth light pulley , the horizontal surface on which the block a can slide is smooth . the block a is attached to a string of spring con ...

HEY GUYS..............CAN ANYBODY PLEASE GIVE SOME OF THE questions that were asked in bitsat-2009............(ofcourse those who have givn thier examination)..sso that we could get the difficulty level..............seriously ...

Two steel balls freely drop onto an elastic plate, the first one from a height of \small \mathit{h}_{1} =44cm and the second from a height \small \mathit{h_{2}} =11cm but after time \small \tau measured from the instant the f ...

Why is the potential energy of a particle inside a liquid negative? ...

Plz explain Which of the following functions of time represent (a)simple harmonic (b) periodic but not simple harmonic and (c) non-periodic motion ? Give period for each case of periodic motion ( ω is any positive constant) ...

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*Image* me getting b,c,d. ans. given is a,c,d............. y it should be a..........i m not getting......plz xplain for a! ...

A bolt of mass 0.3 kg falls from the ceiling of an elevator moving down with a uniform speed of 7m/s.It hits the floor of the elevator (length of the elevator =3m) and does not rebound.What is the heat produced by the impact ...

*Image* when the boxes are lifted though a distance x,find the normal force between them and their acceleration ...

A boat floating in fresh water displaces 35.6 kN of water. What weight of water would this boat displace if it were floating in salt-water of density 1024 kg m-3? ...