Recently Active Mechanics Questions

*Image* for the arrangemnet shown in thefigure, the spring is initially compressed by 3cm. when the spirng is released the block collides with the wall and rebounds to compress the spring again. q>> if the time starts a ...

1. Consider two bubbles of radii r1 and r2 respectively. Let the are allowed to coalesce, Find the common radius of the interface ...

Two capillary tubes of same length and radii in the ration 1:2 are connected in series and a liquid flows through this system understreamline conditions. if the pressure across the two extreme ends of the tube system is 1m of ...

*Image* The max value of m {in kg} so that the arrangement shown in the figure is in equlibrium is given by: 1. 2 2. 2.5 3. 3 4. 4.5 given : - M = 10 kg and μ=.1 for all surfaces ...

*Image* Q. A thin spherical shell having uniform density is cut in two parts by a plane and kept separated as shown in fig. The point A is the centre of the plane section of the first part and B is the centre of the plane sec ...

Assertion: A body can have acceleration even if its velocity is Zero at a given instant of time. Reason: A body is momentarily at rest when it reverses its direction of motion. THE CHOICES ARE SAME AS THAT IN THE JEE PAPERS! ...

Q. A cube of ice of edge 4cm is placed in an empty cylindrical glass of initial diameter 6 cm. Assume that the ice melts uniformly from each side so that it always retains its cubical shape. Remembering that ice is lighter th ...

3 particles at the vertices of an equilateral triangle follow each other and move witha velocity v. side length = l find the acceleration of each particle at t=T. ...

*Image* find the aswers.. reat the questions as 1,2,3 respectively.. ...

assume a big solid sphere wich encompasses the orbitl of the moon round da earth and the moon moves oer a sphere .is da moon slidin or rolling?given dat the time takn for the moon to orbit the earth is 30 days and the tim ...

though projctile is believd to be easiest topic by such stage of time Sir Can I get some idas on deling with projctile sums ...

When we calculate the min velocity at the bottom a body can have while moving in vertical circle attached to a string of length r we calculate the min value of vel for which T=0 and get v= 5gr but when we calculate the same f ...

*Image* try out q17 ............................................... ................................................. ............................................... ans is (A) ...

*Image* MOI os square.. smaller sq has mass m length L Ib=16Is as length is twice and mass is four times.. and Is=KmL2 Ib=K(4m)(2L)2=16Is ..(i) by parallel axis theorem Ib=4Is+4m(l/ 2 )2 Ib=4Is+2mL2 ..(ii) From (i) and (ii) I ...

A block of mass 1kg and density 0.8g/cm3 is held stationary with the help of a string as shown in the figure. the tank is accelerating upwards with an acceleration a=1.0m/s2 find: the tension in the string if the string is no ...

Suppose you find a motionless rope reaching vertically up in the sky (without anybody holding the other end) and hanging down nearly to the ground. What would be the length of the rope? ...

*Image* two thin circular discs of mass 2kg and radius 10cm each are joined by a rigid massless rod of length 20cm. the axis of the rod is along the perpendicular to the plane of the disc through their centres. this object is ...

*Image* find the aswers.. reat the questions as 1,2,3 respectively.. ...

This is a tricky ques found in most books.But i enjoyed solvin it so here it is. Two trains each having a speed of 30km/hr are heading towards each other on the same straight track.A bird that can fly at 60km/hr flies off one ...

Take a square of side \ell , and remove the "middle'' square (1/9 of the area). Then remove the "middle'' square from each of the remaining eight squares, and so on, forever. Let the final object have mass m . Find the moment ...

try Q28 *Image* ans B ...

DERIVE/FIND the MOI of following, (pl. dont giv direct formula) rectangle, AXIS : paasing thru center,in da plane of paper and parallel to one of the sides.... Cuboid, AXIS : diagonal ...

The rod given in setup in fig1 is displaced slightly as shown in fig 2 find the time after which it will return to position in fig2 *Image* fig 1 _________________________________________________ *Image* fig 2 Take spring con ...

The amplitude of two waves are in ratio 5 : 2. If all other conditions for the two waves are same, then what is the ratio of their energy densities? ...

wid itz engine delievering max (and constant ) power, a sports car accelerates from 0 to 60 mph in 9 seconds. how long did it take 2 reach 20 mph?? a) 4.5s b) 1s c) 3s d) 6s ...

A block of mas m is held by the hand over a spring (of spring constant k) which is kept on a table verticaly so that the block just touchesthe end of the spring. Now the block is let go. the vlock compresses the spring and co ...

Q1.A string of bob is attached to a block kept on frictionless surface (bob is hanging ) an impulse is imparted to bob to give it velocity v0 describe motion of block. ...

Q Four tuning forks of frequencies 200,201,204,206 Hz are sounded together . the beat frequeny will be?? ...

A thin uniform hemispherical bowl of mass m and radius R is lying on a smooth horizontal surface,A horizontal force F is applied perpendicular to the rim of the bowl,what is the instantaneous angular acceleration of the bowl? ...

*Image* two blocks are kept on a smooth horizontal table.... they are interconnected by an ideal spring of spring constant k..... A force is aplied as shown....... findthe max. compression of the spring. Ans: 2m1F/(k(m1+m2)) ...