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how to calculate workdone by friction for one cyclic process. does this work done does not depends on the internal energy of the system ...

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*Image* Find the current through 1 ohm resistor : ...

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Can anyone tell me that is there any rule to replace several springs connected (in series or in parallel) having diff. spring const. to a single spring........ *Image* *Image* ...

two small identical discs, each of mass mlie on a smooth horizontal plane. The discs are interconnected by a light non deformed spring of length l and stiffness x. At a certain moment one of the discs is setin motionin a hori ...

A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90o. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the p ...

Discuss the various possibilities for differetn ranges of v0 . velocity is parallel to AB case(i)  when it passes from AB to BC smoothly i.e. along the surface . case(ii)  when it loses contact at B. case(iii) when it mov ...

7. An N turn metallic ring of radius a, resistance R, and inductance L is held fixed with its axis along a spatially uniform magnetic field ~B whose magnitude is given by B0 sin(ωt). (a) Set up the emf equation for the curre ...

A particle moves along a semicircular path of radius R in time t with constant speed. For the particle calculate average acceleration. answer given is : 2 R/t2 why (2 x avg speed/time) is taken n not (2x avg velocity/time) & ...

A body of mass m is pushed with an initial velocity v up an inclined plane of inclination θ.The co eff. of kinetic friction is μ. Find the work done by friction during the upward motion of the body. ...

*Image* An infinitely stretchable rubber band has one end nailed to a wall, while the other end is pulled away from the wall at the rate of 1 m/s; initially the band is 1 meter long. A bug on the rubber band, initially near t ...

Block A is of mass 30kg & block B is of mass 5kg. if μ kinetic friction between the inclined & block A is 0.2, determine the speed of block A after it moves 1m down the plane, starting from rest. *Image* ...

A block of mass 50kg is released from the position of rest at which the spring is under a tension of 45N. Find the velocity of the block at a position when its displacement is 150mm. *Image* ...

in s.h.m is it necessary that at mean position , potential energy is zero. A cart of mass 2 kg is attached to one end of a horizontal spring with force constant k= 150 N/m. the cart is displaced 15 c.m from its equilibriu ...

please anyone explain this problem three points are located atthe vertices of an equilateral triangle whose is a.They all start moving simultaneously with velocity v constant in modulus,with the first point heading for the se ...

wht is a polytropic process n how to usse it...plz explain!! ...

3.20 Figure 3.23 gives the xt plot of a particle executing onedimensional simple harmonic motion. (You will learn about this motion in more detail in Chapter14). Give the signs of position, velocity and acceleration variabl ...

3.18 A police van moving on a highway with a speed of 30 km h–1 fires a bullet at a thief’s car speeding away in the same direction with a speed of 192 km h–1. If the muzzle speed of the bullet is 150 m s–1, with what ...

Example 3.4 A ball is thrown vertically upwards with a velocity of 20 m s–1 from the top of a multistorey building. The height of the point from where the ball is thrown is 25.0 m from the ground. (a) How high will the ball ...

wats d permeability of a superconducting material??? ...

Two bodies of masses M and m (M > m) are attached to the two ends of a light inextensible string passing over a frictionless pulley. The system is held at rest with the string taut and vertical with both masses at a height ...

d periodic tym of vibrations of d simple epndulum at a certain place is 1.6sec and at d poles is 1.2 sec takin d radius of d earth as 6380km m d lenght of d pendulum as 1m find d latitude of d place ...

A mark is made and a glass slab is placed over it. What will happen when a ray of light from this mark strikes a vertex of the slab? ...

Q. A block of weight 100 N is slowly slid up on a smooth incline of inclination 37° by a person. Calculate the work done by the person in moving the block through a distance of 2.0 m , if the driving force is (a) parallel to ...

Q. A box weighing 2000 N is to be slowly slid through 20 m on a straight track having friction coefficient 0.2 with the box. (a) Find the work done by the person pulling the box with a chain at an angle θ with the horizontal ...

a ball is dropped wid negligible velcity on a floors of a lift which is accelerating upwards the e=1 when the ball strikes the floor 8:40 PM assertion the ball will reach to the same heigh[in earths frame..] reason:when a ...

imagine yourself watching from the sun.will the earth appear encircling the moon or moon encircling the earth? ...

please dont get afraid by the size of the question beleive me it is easy (give it a thought cmon)!! *Image* ABOVE THE background neede to solve this one is given the two questions are given below *Image* i will tell the sourc ...