Recently Active Mechanics Questions

a plane wave y=A sin ω[t-x/v] undergo a normal incidence on a plane boundary separating medium M1 n m2 and splits into a reflected n transmitted wave having speed v1 and .comment on phase of transmitted n reflected wave ,ll ...

Consider a elevator accelerating upward with 2.4m/s2. Inside the elevator there is a ball of mass 1kg tied to the ceiling using a massless string. The elevator travels 30m up and then the string breaks and the ball is let loo ...

A small ball of mass m is released from a height R above the surface ot the earth surface as shown. If the maximum depth of the ball to which it goes into the earth is R/2 through a narrow grove before coming to rest momentar ...

*Image* A heavy string istied atone end to amoveable support and to a light string at the other end as shown. he string goes oer a puley(fixed) & supports a weight to prouce a tenion. The lowest frequency with which the heavy ...

Q A man of mass 80 Kg pushes a box 20 Kg horizontally . the man moves the box with a constant acceleration of 2 m/s2 but his foot does not slip on the ground. there is no friction btwn the box and the ground , whereas there i ...

*Image* A weightless rod with a length `l` is rigidly attached to a weightless pulley with radius `r`. The end of the rod carries a mass `m` .A string to whose free end a mass `M` is fastened is passed over the pulley . in wh ...

A circular ring of mass M and radius a is placed in a gravity free space. A small particle of mass m is placed on the axis of the ring at a distance √3a from the centre of the ring is released from rest. the velocity of the ...

WHat is the moment of inertia of a cuboid over 1.any particular edge 2.any body diagonal 3.COM no need for derivations,the expressions will do ...

a particle is approaching with a velocity of 5i^+3j^ and it returns after colliding with a velocity of -3i^+4j^ find the coefficient of restitution ...

a block of mass m is placed on a smooth wedge of inclination theta The whole system is accelerated horizontally so that the block does not slip on the wedge The force exerted by the wedge on the block has a manitude is the an ...

*Image* none of my answers seem to match with the options given :( ...

there is ball file with water.then centre of mass in centre of sphere we make hole in it . then does it centre mass must change as water come out at last centre of mass is in centre again how? ...

A hollow cylinder of mass m1, filled with water of mass m2, is pure rolling on a sufficiently rough surface with a speed v. What is the total kinetic energy possessed by the cylinder+water system? Options: (a) 0.5*(m1+m2)*v2 ...

A spaceship is sent to investigate a planet of mass M and radius R. While hanging motionless in space at a distance of 5R from the centre of the planet, the spaceship fires an instrument package with a speed V at an angle the ...

A machine gun of mass M/4 is mounted on a plank of mass 3M/4. The barrel of the gun is inclined at an angle of θ with the horizontal. The plank is moving on a smooth horizontal surface in x-y plane of a coordinate system alo ...

A cylindrical vessel is filled with equal amounts by weight of water and mercury.The overall height of the two layers is 29.2. Determine the pressure of the liquid at the bottom ? density of hg= 13.6.... i found out the heigh ...

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Q40 A uniform solid cylinder of density 0.8 g/cc floats in equilibrium in a combination of two non-mixing liquids A and B with its axis vertical. The The densities of liquids A and B are 0.7 g/cc and 1.2 g/cc. The height of l ...

What are the disadvantages of cars like this : *Image* ...

Q1. Two particles 1and 2 move with constant velocities v1 and v2 .At the initial moment their radius vectors are equal to r1 and r2. How should these four vectors be interrelated for the particles to collide? I could not unde ...

These are conceptual questions for all....... Whats direction of friction on cylinder in each case............. *Image* ...

what do u understand by f(t-x/v)????(in case of waves) write anything ,what u can extract from this. ...

*Image* a disc of mass M and radius R can rotate freely about a horizontal shaft at S distant r from the centre of mass of the disc 0.the disc is released from postion shown figure,its angular acceleration will be ...

*Image* a bubble having surface tension T and radius R is formed on a ring of radius b (b <<R) . air is blown inside the tube with velocity 'v' as shown.the air molecule collides perpendicularly with the wall of the bub ...

Many Blocks are placed one over the other such that some part of the upper slab hangs out of the lower one. How will you Determine the stability?? eg: assume that there are 4 blocks. each of length 1 m. The 1st block is on gr ...

*Image* WHICH 1 REACHES THE GROWND FASTER X OR Y[SORRY THIS IS VERY STUPID] ...

*Image* I know this un is quite easy! but guys can u pl. que6 and wat wud b ur ans for que5 if the wave was moving towards "+VE X-Axis??? Y??? [7] ...

*Image* PL. HELP IN 36 & 37........... 37) I got dat x = 10/Î but not getting time to travel that distance x ...

A square plate of mass M and edge length L is shown in figure. Find the moment of inertia of the plate about the axis in the plane of the plate passing through one of the vertex making an angle of 15° from the horizontal. *I ...