Recently Active Mechanics Questions

Is work energy theorem valid in noninertial frames ?? ...

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 ...

*Image* I GOT ANSWER AS 3 PLS POINT OUT THE MISTAKE IN MY SOLUTION: mA(9)=mBvB (Since collision is elastic) Thus, vB=9/2 ms-1 Collision between B and C is inelastic so 2mvB=3mvcommon So vcommon=3 ms-1 But ans given is 4 ms-1 ...

well many of you must be knowing about ICR - instantaneous centre of rotation . but i here give an example of a very common situation in rotational mechanics .Interpret it carefully . prolem 1 (starter) Consider a purely roll ...

A BALL STRIKES A WALL(ASSUME PERFECTLY ELASTIC COLLISION).THE BALL BOUNCES BACK WITH SAME VELOCITY(SAY V). SO,WE SEE THAT KINETIC ENERGY REMAINS CONSERVED BUT THE MOMENTUM OF BALL CHANGES BY 2mV. HOW CAN WE HAVE THAT MOMENTUM ...

*Image* Calculate the acceleration of either blocks and the tension in the string shown in the figure.The pulley and the string are light and all surfaces are smooth. ...

*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 ...

2 heavy circular rollers of diameters D and d , respectively , rest on a rough horizontal plane as shown in the figure. The larger roller has a string wound around it to which a horizontal force P can be applied as shown. Ass ...

a large bubble rises frm bottom of a lake to itz surface itz radius is doubled d atm pressure is equal to that of colmn of water of height h d depht of d lake is ?? ...

a closed cubical box is completly filled with water n accelerated horizontly towards right with acc a .d resultant normal force by water on the top of box 1 passes tru centr of top 2 pass thrun right of centre 3passes thru le ...

a force -f(k^) acts onthe originof coordinate system .torque abt the point (1,-1) ...

q to construct a barometer a tube of length 1 m is filled completely with mercury n is inverted in a mercury cup .the barometer reading on a particular day is 76 cm suppose a 1 m tube is filled with mercury up to 76 cm n then ...

1) A particle moves in a straight line with retardation proportional to its displacement. Its loss of kinetic energy for any displacement x is proportional to: (a) x2 (b) ex (c) x (d) logx ...

two blocks of mass 3 n 6kg r attached to a spring of k=800N/M on a horizontal surface.the spring is initially compressed by 6 cm n then released. 1. the particales perform SHM with time period π/10 sec. 2. the block of mass ...

two spherical conductors a n b of radii 1 mm n 2 mm are separated y a distance 5 cm n are uniformly charged .if the spheres r connected by a conducting wire then in equilibrium condition ,the ratio of the magnitude of e field ...

a linear harmonic oscillater of force constant 2*106N/M n amplitude 0.01m has a total mechanical energy of 160 joule.its 1. max. potential energy is 100J 2. max. kinetic energy is 100J 3. max. potential energy is 160J 4. min. ...

*Image* In figure m1=1 kg and m2=4kg.Find the mass M of the hanging block which will prevent the smaller the block from slipping over the triangular block.All the surfaces are frictionless and the strings and the pulleys are ...

A force F1 accelerates a particle from rest to velocity v.Another force F2 decelerates the same particle from v to rest,then: (a)F2 is always equal to F1 (b)F2 is greater than F1 (c)F2 may be smaller than ,greater than or equ ...

The frequencies of two tuning forks are 480 cps and 480.05 cps respectively. When sounded together, after how much interval the maximum sound will become half if the minimum intensity is zero ? 5 s 10 s 20 s 0.025 s ...

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

A block of mass m is placed at rest on an inclined plane of inclination @ to the horizontal.If the coefficient of friction between the block and the plane is U then the total force the inclined plane exerts on the block is : ...

PG-102 EXAMPLE 7.3 FOLLOWING THINGS ARE WRONG IN IT- 1.HOW CAN WE CALCULATE LINEAR ACCELERATION WHEN THE PARTICLE IS MOVING WITH UNIFORM SPEED. 2.THEY USED FORMULA LINEAR ACCELERATION=v2/r [4] WHICH IS THE FORMULA FOR RADIAL ...

*Image* A block is placed as shown in the figure .What must be the frictional force between the block and the incline if the block is not to slide along the inclibe when the inclone is accelerating to the right at 3m/s2 (sin ...

A plate, bent at right angles along its center line, is placed onto a horizontal fixed cylinder of radius R as shown in the figure. *Image* How large does the coefficient of static friction between the cylinder and the plate ...

a particle experiences constant acceleration for 6 secs after starting fom rest. it travels d1 in first 2 secs it travels d2 in next 2 secs it travels d3 in last 2 secs then, d1:d2:d3 = ??? ...

*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)? ...

i made up this question last nite,.,...so forgive me for languge error..... *Image* but i hopw u get the essence of the question ...

A body is allowed to slide on a frictionless track from rest position under gravity. The track ends into a circular loop of diameter D. What should be the minimum height of the body in terms of D so that it may complete the l ...

A man of mass 'm' stands on a platform of mass 'M' kept on a ice block (friction = 0). If the man walks on the platform with a velocity 'v' w.r.t the platform, the relative velocity of the platform, the relative velocity of t ...

*Image* nw d q says wich of d curve is adiabatic options AB and BC AB and CD AD and BC BC and CD ...