Recently Active Mechanics Questions

A copper wire is held at the two ends by rigid supports.At 30°C. the wire is just taut with negligible tension.Find the approx. speed of transverse waves in this wire at 10°C( in m/s). Given ( Young's mod= 1.3*10^-4N/m^2) C ...

If resultant force on a system of particles must increase: then choose correct option: A the linear momentum of system must increase B the vel. of COM of system must increase C the distance of COM may remain constant from fix ...

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*Image* wat is d answer?? ...

what is d intensity of sound in SI units??? if loudness level is 220 db.. ...

the length of a needle floating on water is 2.5 cm. the min force in addition to its weight needed to lift the needle above water surface.(surface tension =0.072 MN/m) ...

Two sound sources s1 and s2 of same frequency, are situated at a distance 2 m and 4 m from a point P respectively. At P the intensity of sound is 1 W/m2 if only source s1 is put on, and the intensity is 4 W/m2 if only source ...

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*Image* If the total energy of the particle is E, it will perform periodic motion only if : (A) E < 0 (B) E > 0 (C) V0 > E > 0 (D) E > V0 ...

Consider a particle moving in a circle performing non-uniform motion.Consider one revolution of the particle.In that revolution the net displacement is zero(you should use Fnet.d).So,net work done by the net force is zero.But ...

A small ball is thrown from a height of 15 m above the ground and at a horizontal distance d from a vertical wall.The ball first hits the wall and then strikes the ground and then it flies back to its initial position of thro ...

A ring as shown in the 'figure' is made up of two semi circular rings A and B of masses " 2 Kg " and " 4 Kg " respectively. The ring has diameter " 1 m ". If the Ring rolls without slipping, Find - *Image* 1. " Angular Accele ...

how can we prove that time period of compound pendulum is minimum when its length is equal to the radius of gyration about its centre of gravity... pls reply urgent... ...

Suppose a particle is moving along x- axis with constant velocity.A force F directed along y-axis starts acting on it.Just take the motion along y-axis of the particle.As particle accelerates along the y-direction its velocit ...

A ball of mass M moving with velocity V0 on a frictionless surface strikes the first of two identical balls, each of mass m = 2 kg, connected by a massless spring with spring constant k = 1 kg/s2 (see Figure). Consider the co ...

What is the maximum angle to the horizontal at which a stone can be thrown and always be moving away from the thrower ? the interesting thing is all over projectiles i never thought of this as a problem ;) ...

consider a u tube filled with water (height h both arms). now let it displace by x units. find time period.... ...

statement1 - a liquid cannot emerge in the form of a fountain from the upper end of a short capillary tube, kept immersed in water. statement2 - if the length of the tube is h' , is less than the rise h , the liquid would spr ...

A thin unifor rod is suspended in vertical plane as a physical pendulum about point A.The time period of oscillation is T0.Not counting the point A,the number N of other points of suspension on rod such that the time period o ...

*Image* A rod (red) is just release from the position shown here.. Where will the rod finally rest? (to the right, to the left) Why? Clarifications: No friction.. Red part is the rod Vertical Black line is a string Blue top i ...

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a uniform length L is actd upon by 2 colinear forces P ND Q...APPLIED 2 ITS ENDS IN OPP direction..calculate tension at a distance 'l' frm the end where force P IS APPLIED... ...

*Image* oops i got it now sorry for silly mistake thanx for help....thread closed! ...

*Image* FIGURE (a) A smooth wedge of mass M rests on a smooth horizontal surface. A block of mass m is projected from it's lowermost point with velocity V0 . What is the maximum height reached by the block ? ...

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sorry got it thread closed! ...

famous question which is mostly solved using ground frame i want u to solve it in the frame of elevator (i.e. non-inetial frame) a block on floor of elevator which starts acelerating down with 12m/s2 will get displaced by how ...

sorry thread closed! ...