Recently Active Mechanics Questions

where is the flaw......... *Image* ...

1.CAN A SPHERICAL BODY ROLL ON ANOTHER SPHRICAL BODY...EXPLAIN WITH EXAMPLE 2.WHY IS IT THAT A FREEWHEEL IN A CYCLE HAS LARGER DIAMETER THAT A GEAR WHEEL 3ASSUME A BIG SPHERE WHICH ENCOMPASSES THE MOON AROUND THE EARTH AND TH ...

a wire of length l and linear mass density k is lying on a smooth horizontal floor.one end of a wire is pulled with const velocity v.what is the avg.power consumed in lifting the wire just off the ground(end of wire just abov ...

After SHM SHM here is waves tread..i dont have a lot of questions on this topic..but i will psot some good ones for all.... Here are first 5 questions..i will post more if they are solved.. Q1 *Image* Q2 *Image* Q3 How long w ...

i hav problems with sign conventions in work,power,energy somebody told me to use co-ordinate sign conventions in the whole of mech.. is it a good idea ...

Ill be posting some of the questions of Aakash AITS which i cudnt manage to do I have been messing up Physics very very badly, at Aakash also as well as in BT Q1. A rod of mass m (hinged at one of its ends at O) has a particl ...

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i am not understanding this concept when a slab is placed in fromt of one of the silts it results in the shifting of the fringes inderstood the ashift is something say x...... it is written in dc pandey that no of fringes shi ...

if tension in sonometer wire is increases by 20%...the frequncy of the same mode of vibration increases by ??? i am gettign 10% but answer is 14% plz point out my fooolish mistake ...

The trajectory of a body with 2 simultaneous,perpendicular oscillations is determined by x=a sin(pωt) y=b sin(qωt+φ) where x and y are projections of body displacement on X and Y axis. For simpicity let us assume pω=qω=Ï ...

The loudest painless sound produces a pressure amplitude of 28 Nm-2.Calculate the intesity of this sound at STP. density air=1.3 kg m-3,speed sound=332 m/s ...

Please show that for a perfectly elastic head on collision of a ball of mass 'm' with another ball of mass 'km' , initially at rest , the energy lost by the former is maximum when k = 1. ...

*Image* given statement: y-component of velocity of M is u1 cosθ1 + u2cosθ2 ans is given as false why?? ...

A rope ladder with a length L carrying a man of mass m at its end is attached to the basket of a balloon with a mass M. The entire system is in equilibrium in the air. Find the work the man should do to climb into the basket. ...

im gonna keep posting some good problems in mechanics from now on. u wudnt find these problems to be really fundu. level or or sumthing, but wud still find it conceptual enuff.some rules u have to follow while doing this will ...

this q was in one of the tests on the site A ball hits a plank lying on the ground (ball's velocity at the time of hitting the plank is 10i+10j). The coefficient of friction is between the ball and the plank is 0.5. There is ...

two ships are 10 km apart on a line from north to south. the one farther north is moving towards west at 40 km/hr and the other is moving towards north at 40 km/hr. what ios their closest approach and how long do they take to ...

a disc of mass m=1kg and radius r=1m is hanging from the roof with a light rod of length l=2m as shown in the figure.the disc can rotate freely about hinge point C and the rod can rotate freely about hinge point O . at the gi ...

A wheel of a truck moving with velocity 5m/s throws up mud particles from its rim. The wheel's diameter is 3m. Find the maximum height from ground to which a particle can reach. (wheel does not slide on road) ...

Which of the following shapes is better for a blade to float? *Image* Note: This is my own question.. I have an opinion and an answer.. But your answers are most welcome... I want to see this one more as a discussion than as ...

Statement 1 : A cloth covers a table.Some dishes are kept on it.The cloth can be pulled out without dislodging the dishes from the table. Statement 2 : For every action there is an equal and opposite reaction. Is it practical ...

(D.C. Pandey........) A circular tube of mass M is placed vertically on a horizontal surface as shown in the figure. Two small spheres, each of mass m, just fit in the tube are released from the top. Find M/m if the tube just ...

Two sticks, each of mass m and length l, are connected by a hinge at their top ends. They each make an angle theta with the vertical. A massless string connects the bottom of the left stick to the right stick, perpendicularly ...

Q) A very flexible uniform chain of mass M and length L is suspended vertically so that its lower end just touches the surface of a table.When the upper end of the chain is released, it falls with each link coming to rest the ...

The two ends of a heavy rope of weight W are tied to two hooks A and B on opposite walls. The hooks are tied at the same horizontal level. If the rope makes angle θ with the walls at A and B, the tension T at the midpoint of ...

*Image* ax= F/2m ( x/√l2-x2 ) ...

a metal ball falls vertically nd strikes plane inclined at an angle (theta) to d horizontal (theta <45). d ball rebounds horizontally. show dat d fraction (1-e) of d kinetic energy is lost during d impact if m is d mass nd ...

Practice questions for SHM... Level=easy Q1 Dtermine the natural frequency of vibration of 100N disc.Assume it does not slip on inclined surface *Image* Q2The disc has weight=100N and rols without slipping on horz surface as ...

The minute hand of a church clock is twice as long as the hour hand. At what time after midnight does the end of the minute hand move away from the end of the hour hand at the fastest rate? ...

A wind power generator converts wind energy into electrical energy. Assume that the generator converts a fixed fraction of wind energy intercepted by its blades into electrical energy.For wind speed v,the electrical power out ...