Recently Active Mechanics Questions

A Simple Pendulum consisting of a Mass M attached to a string of length L is released from rest at an angle α. A pin is located swings down, the string hits the pin. The max angle θ which string makes with the vertical afte ...

At t=0, an ant is at(-1m.0m) & a spider is at (1m,0m). The ant starts walking counterclockwisealong the unit circle,& spider starts creeping to the right along the X-axis. The ant"s horizontal speed is always half of the spid ...

assertion:at the centre of the earth a body has centre of mass but no centre of gravity Reason: This is becuse g=0 at the centre of the earth Please explain it also ...

1)is this statement correct Gravitational potential of earth at every place on it is negative it will be negative if we take refrence as infinity Won't it be changed if we change the refrence point 2)Assertion: Even when the ...

the lower end of capillary tube is at a depth of 12 cm in water and the water rises 3 cm in it The mouth pressure required to blow an air bubble at the lower end will be ...

hey guys i am not getting the answer, plzz help *Image* a rod of length L is lying on a smooth roller of height `h` as shown. find the coefficient of friction between the lower end of the rod and ground if the minimum angle i ...

A bullet loses 1/20 of its velocity in passing through a plank . what is the least number of planks which are required to stop the bullet. ...

A force F=5zi+xyj+x2zk where i,j,k are unit vectors along x,y,z a)is conservative b)is nonconservative c)is conservative along some paths d)may be conservative or non conservative depending on x,y,z ...

*Image* ...

*Image* find acceleration of all blocks........ neglect friction.......... wedge is fixed ...

*Image* 0.01 moles of an ideal diatomic gas is enclosed in an adiabatic cylinder of cross-sectional area A = 10 –4 m2. In the arrangement shown, a block of mass M = 0.8 kg is placed on a horizontal support, and another bloc ...

A rolling sphere is rolling without slipping on a surface and no force other than force applied by surface and weight is acting on it. Match the column I with column II. Column I Column II (a) Surface is horizontal (p) Transl ...

*Image* In figure,there are shown two similar,uniform,rigid rods A and B each of mass M and length L are placed in contact at their one ends,on a smooth horizontal table.A sharp impulse is applied at one end of the rod A as s ...

The velocity of the particle is 10 3 m/s.. 1. Find the verticle height h... 2. Maximum height attained by particle from O 3. distance PQ (NOTE: The particle is projected and hits the planes perpendicularly..) *Image* ...

Can somebody mathematically prove that at resonance, amplitude of the oscillating system becomes high? This might be simple but most of us only know the fact and don't have this proof. Try it.. ...

Dont know where I am wrong....... I solved this question by 2 diff methods and am getting answers diff.....plzz tel my mistake Q A sphere of 5 kg specific gravity 2 is completely submerged into water.Find radius of sphere met ...

Dont know where I am wrong....... I solved this question by 2 diff methods and am getting answers diff.....plzz tel my mistake Q A sphere of 5 kg specific gravity 2 is completely submerged into water.Find radius of sphere met ...

3 identical discs A,B,C rest on a smooth horz surface.Disc A is set into motion with speed u after which it experiences elastic collision simultaneously with B and C.Distace b/w centres of B and C prior to collision is n time ...

A ball falls vertically onto a floor, with momentum p, and then ball bounces repeatedly. The coefficient of restitution is e. The total momentum imparted by ball to the floor is A) p(1 + e) B) p/(1 - e) C) p(1 + 1/e) D) p{ (1 ...

*Image* ...

STATEMENT:for an ideal fluid flowing thru a horizontal pipe of non uniform cross section,the pressure decreases with decrease in cross section i found this statement in an assertion reason qn and it is given that it is true,c ...

A massive wooden plate of unknown mass M remains in equilibrium in vacuum when n bullets per second are fired on it.The mass of each bullet is m (M>>m).Each bullet strikes the centre of the plate with speed v,coeff of r ...

*Image* sorrry 4 postin such a horrific image ....LOL...... ans = a ...

*Image* ...

a body whose dimensions may be neglected is placed inside a thin homogenious sphere.prove that the force of attraction acting from the sphere on the body is zeroirrespesctive of its position inside the sphere! ...

block A of mass 1kg resting on a horizontal surface is attached to block B of mass 0.5kg by means of a massless and inextensible string going over a frictionless fixed pulley .the string connected to A is loose .When B falls ...

TWO STONES ARE PROJECTED FROM A POINT P IN THE SAME DIRECTION WITH A VELOCITY OF 20m/s ONE AT ANGLE α ABOVE THE HORIZONTAL AND THE OTHER AT AN ANGLE α TO THE VERTICAL.FIND THE DISTANCE OF EACH STONE FROM P 1 SECOND AFTER PR ...

*Image* system shown in figure is in equilibrium. find the magnitude of net change in the string tension between two masses just after, one of the springs is cut. masses of both the blocks is same and equal to M. and spring c ...

*Image* find the minimum value of μ between the two blocks for no slipping ...

*Image* find the time period of oscillation of M ...