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# Workdone

## 29h ques

Asked by lovemaan5500 27th December 2017 1:35 PM

## What should be the angle bw the force and displacement to get the minimum work

Asked by lovemaan5500 15th March 2018 7:30 AM

## A partile of mass 500g is moving in a circle of radius 1m with speed v (m/s) = 4t^2. The rate of work done on the particle at t = 2s is ?

Asked by dipanshusingla029 3rd April 2018 5:46 PM

## A system has internal energy equal to U1 600J of work is done on the system when 450 J of heat is lost. The final energy of system is_________________________. for this.. the formula is  U=Q+W   OR   Q=U+W

Asked by imtiyazmulla68 2nd May 2018 7:49 PM

## Ten pipes of the same type are required to fill a tank in 24 min.If two pipes go out of order ,how long will the remaining pipes take to fill the tank?

Asked by nathsantanukumar 9th May 2018 5:23 PM

## can you move a charge in an electric field without work done and how?

Asked by my3shyll 9th May 2018 10:59 PM

## Two  charges +q and -q are  located  at  points  A [0,0,-a] and B [0,0,+a]  respectively. How  much  work is  done  in  moving a  test  charge from point  P [7,0,0] to Q [-3,0,0] ?

Asked by pardeepkumar2281 9th May 2018 11:08 PM

## i don`t understand why it is no work done in moving a charge in equipotential surface? in order to move a charge in an equipotential surface we should apply some force right? does it account for work? why is the work done is zero?

Asked by my3shyll 11th May 2018 6:59 PM

## A 50kg man with 20kg load on his head climbs up 20 steps of 0.25m height each.The work done on climbing is?

Asked by girishbiswal 21st May 2018 7:29 PM

## a horizontal force of 0.5 Newton moves a body of mass 2 kg initially at rest on a smooth table find the work done by the force in 8 second and show that this equals the change in Kinetic energy of body

Asked by Samrat 29th June 2018 10:13 PM

## A  200 kg cart is pulled slowly up an incline how much work is done by pulling force in moving the object up to  a point  2.5 M vertically above the starting point

Asked by Samrat 29th June 2018 10:20 PM

## A bullet of mass 2g from moves with a velocity of the 300  metre per second it  strikes a tree and penetrate  to a depth of 5 cm before coming to rest what is the change in the bullets kinetic energy how much work does the tree do on the bullet what is the average retarding force  of bullet

Asked by Samrat 29th June 2018 10:24 PM

## A block of mass of 4 kg is drawn at a constant speed a distance of 5m along a horizontal Floor by a rope exerting a constant force of 10 Newton making an angle of 60° with the horizontal find the total work done on the block and the work done by the rope on the block

Asked by Samrat 30th June 2018 7:05 PM

## A machine is driven by a 100 kg mass that falls 8 m in 4 seconds it lifts a load of 500 kg vertically upwards a.what is the force in Newton exerted by falling mass b.what is the work done by 100 kg mass falling through 8 m c. what is the power input to the machine d. If  the efficiency of the machine 75% what is the power output of the machine e.what is the work done by the machine in 4 sec

Asked by Samrat 30th June 2018 7:24 PM

## A man loses a 2.5 M long crowbar to raise a 100 kg mass such that load arm is 0.5 CM the distance moved by the effort is 0.1 M find a.effort needed to lift a load B. Mechanical advantage of crowbar c.the work done by the effort d.distance the load is raised  e.the work done on the Load f. the efficiency of the crowbar

Asked by Samrat 30th June 2018 9:10 PM

## An electric motor of power 125 w is switched on for 1 minute 40 second if 75% of energy of motor  is useful then find useful work done b.load lifted by it through the  height of 4 m

Asked by Samrat 30th June 2018 9:28 PM

## A body of mass  2 kg initially  at  rest  is moved by a horizontal  force  of 0.5 N  on  a smooth  table . The  work  done by  the  force in  8 second

Asked by parveenhooda2341 18th July 2018 9:18 AM

## A tank of height 5m is completely filled with water. work done to empty a tank to one fourth of its depth such that initial mass of water in tank is 50 kg is.

Asked by sbtech357 22nd July 2018 3:50 PM

## Diwakar can do a work in 8 1/2  days. After Diwakar worked for 2 days, Bhaskar joined. They worked for one day. The capacity of Bhaskar is double the capacity of Diwakar.On the 4th day, the work is completed by both with the help of Harsha. In howmany dayscould Harsha alone do the work?

Asked by nathsantanukumar 10th August 2018 7:28 AM

## Tell me fast sir.

Asked by jsa788153 19th August 2018 3:49 PM

## A man places a chain of mass m and length l on a table slowly .initially the lower end of the chain just touches the table ,the man drops the chain when half of the chain is in vertical position then work done by the man in this process is

Asked by m.nilu 20th August 2018 7:51 PM

## Three charges of q,3q, and -2q are placed at the vertices of an equilateral triangle of side 20cm. If q is 2 microcoulomb, what work must be done to dissociate this system of charge?

Asked by lekhakarthikeyan 21st August 2018 10:05 PM

## compare the work done and power of pallavi and parul when both of them can lift the same bag of 20kg to a height of 50cm. in 2and 5 seconds respectively(Take g=10ms-2)

Asked by sujanasudheer37 10th September 2018 10:17 PM

## If a spring mass system is placed on a horizontal smooth surface. Then find the net work done by spring force after one time period(assume suitable variables)

Asked by Pjdrd24680 15th September 2018 8:06 AM

## Person coming down by lift or  slope or stairs. Which case work done is more and why?

Asked by biplabkanti71 16th September 2018 8:15 AM

## If 15 men can do a job in 24 days,in how many days will 40 men complete the same job?

Asked by lucy 19th September 2018 9:55 PM

## A can do a piece of work in 'x' days and B can do the same work in (x+16)days . If both working togather can do it in 15 days;calculate 'x'.

Asked by hermanlakra93 23rd September 2018 6:33 PM

## If 8 people take 1 hour to load 5760 bricks on a truck, how long would it take 6 people to load 5760 bricks on the truck

Asked by nikitasuresh0 24th September 2018 9:48 PM

## Q. Derive an expression of work done in making a body of mass 'm' free from earth's gravitational field. Using the result, obtain an expression of escape velocity. Also show escape velocity depends only on the density of the planet of a given size.

Asked by neerajprataphazarika 24th September 2018 10:50 PM

## Q.Derive an expression of elastic strain energy gained by a stretched wire. What happens to this energy when deforming force is withdrawn? State hooke's law and represent it graphically.

Asked by neerajprataphazarika 24th September 2018 10:52 PM

## 1st numerical plz

Asked by lovemaan5500 29th September 2018 8:54 PM

## Derive an expression for work in rotating dipole use it to find formula for energy of the dipole. What is the stable position of dipole in the field?

Asked by 342849142950171 1st October 2018 1:13 AM

## Shouldn't it be 8 - 3.5 = 4.5 ?

Asked by jay7venture 6th October 2018 8:55 PM

## the velocity of a moving particle varies with distance moved as v=3+4x  .if the mass of the particle is 2kg determine the work done.on the particle during the time its displacement changes from  x=1 to x=2m.

Asked by Amitamit1ganga2 15th October 2018 6:54 AM

## A body of mass 250 kg is lifted 5 meters above the ground. Calculate th work done by it

Asked by ranendrachandrabhattacharjee 7th November 2018 9:34 AM

## How work done = difference between k.e

Asked by swainanirudha1 12th November 2018 11:52 PM

## a block of mass 5 kg is  allowed to fall from certain height. Find the work done by gravity in one second after the block is dropped

Asked by prachiverma302003 8th December 2018 8:38 PM

## What is the work done by a man in carrying a suitcase weighing 30 kg over his head, when he travels a distance of 10 m in the (i) vertical direction (ii) horizontal direction.

Asked by swainanirudha1 21st December 2018 6:28 AM

## a load 500 kg is lifted from the bottom of a 100 M deep shaft using a rope which wait 1 kg per metre find the total amount of work done

Asked by swainanirudha1 21st December 2018 1:37 PM

## Please explain the theory in the image.

Asked by kandappan 30th December 2018 9:15 AM

## Shush and Komal can do a job together in 7 days. Shush is 7/4 times as efficient as Komal. The same job can be done by Shush alone in

Asked by rushabhjain.a 31st January 2019 9:46 AM

## A body is displaced by 20 m, when a force of 20N acts on the body. The work done is

Asked by Reetusahrey 7th February 2019 7:36 PM

## An object p of mass m

Asked by alam.ehtesham02 16th February 2019 8:21 PM

## 1) Why is no work done when a person is holding a briefcase in his hand ? 2) Sometimes the air bubbles emerging out of a fish tank apeear silvery ? 3) Why do the faces of the persons sitting around a camp fire appear to be shimmery ? 4) State two important precauitions during an experiment for finding specific latent heat of ice . 5) An electric bulb gives much brighter light when the magnitude of emf increases . Explain  6) State two ways of increasing magnitude of induced current .  7) From the ground floor , a man comes upto the fourt floor of a building using a staircase . Another person comes upto the same floor , using an elevator . Neglicting frition , comparee the work done in two cases .  8) What is the range of loudness level for normal conversation and whispering ? 9) How does the water in a living system( just as our body ) controls and maintains our body temperature ? 10) What do you understand by the term refraction of light ? 11) Why do the diamonds sparkle ? 12) Explain briefly the energy released in a thermal power plant is converted into electric energy .  13) Why is the power generated at the power houses stepped up during transmission ? 14) Why are the coils of a heavy transformer immersed in a special kind of oil ? 15) A copper calorimeter weighing 57.5g contains 60g of water at 12 degree C , 55 g of iron nails at 100 degree C are dropped into the calorimeter , when the final temperature of the contents of calorimeter is 20 degree C . Calculate the specific heat capacity of iron . [ Specific heat capacity of copper is 0.4 J/gC and that of water is 4.2 J/gC]  16) Calculate the wavelength of an electromagnetic wave of frequency 15 MHz  17) What do you understand by the term radioactivity .

Asked by DILIP 16th February 2019 11:11 PM

## orce is applied on a body of mass 20 kg moving with a velocity of 40 ms-1. The body attains a velocity of 50 ms-1in 2 seconds. Calculate the work done by the body. orce is applied on a body of mass 20 kg moving with a velocity of 40 ms-1. The body attains a velocity of 50 ms-1in 2 seconds. Calculate the work done by the body. orce  is  applied  on  a body  of  mass  20  kg  moving  with  a  velocity  of  40  ms-1. The body attains a velocity of 50 ms-1in 2 seconds. Calculate the work done by the body.

Asked by senank123 18th February 2019 12:21 PM

## A force is applied on a body of mass 20kg moving with a velocity of 40m/S .The body attains a velocity of 50 m/s in 2s.calculate the work done by the body.

Asked by Mail.nehasharmaa 19th February 2019 10:13 AM

## An infinitely large thin plane sheet has an uniform surface charge density +σ . Obtain the expression for the amount of work done in bringing a point charge q from infinity to a point distance r in front of the charged plane sheet.

Asked by ritikabehera01 4th March 2019 12:19 AM

## What is the work done when force acts at an angle in the direction of motion

Asked by Shalluchhabra 11th March 2019 10:11 PM

## A diatomic gas undergoes a process represented by PV^1.3=constant. Choose the incorrect statement-(1)The gas expands by absorbing heat from the surroundings, (2) The gas cools down during expansion, (3) The work done by surroundings during expansion of the gas is negative, (4) None of these

Asked by patra04011965 18th March 2019 10:55 PM

## Prove that work done by an electric field in path independent

Asked by elizabethcordilia1997 4th April 2019 9:07 PM

### CBSE XII Science Physics

Asked by dineshchem108 19th April 2019 11:21 AM

## The wages of 10 workers for a six days week are ₹ 1200. What are the one day wages :  ¡ ) of one worker ? ¡¡) of 4 workers ?

Asked by garganimesh786 29th April 2019 5:49 PM

## A body of mass 500g moving with 10ms^-1, increases to 20ms^-1 when acted upon a force.Find (i) the chane on Kinetic Energy (ii) the work done by the foorce (iii) name the theorem based on the same

Asked by rsankit1221 11th July 2019 9:35 PM

## why is work done on an object moving with uniform circular motion zero

Asked by niketansorte1092005 5th August 2019 8:44 PM

## Two points P and Q are maintained at the potentials of 10v and - 4v respectively .what the work done on moving 100 electrons from P to Q  ?

Asked by hasnain.hossain121 6th August 2019 9:45 PM

## Please explain the work done by a variable force.

Asked by kandappan 9th August 2019 6:07 AM

## an electric dipole is placed in a uniform electric field vector E with its dipole moment vector P parallel to the field . Find   1) the work done in turning the dipole till its dipole moment points in the direction opposite to vector E.

Asked by kothattil439 13th August 2019 9:21 PM

## 0.5 mole of a diatomic gas at 27°C is heated at constant pressure so that its volume is trebled.  If R=8.3 J/mol-K then the work done is

Asked by gvr20689 18th August 2019 9:55 PM

## Please solve Q no 69 Given ans option 3

Asked by Nishantthakre95 11th September 2019 12:22 PM

## A force of 40 Newton acts on a object at an angle of 45 degree with horizontal as a result the object is displaced horizontally through a distance of 14 metres calculate the work done by the force on an object

Asked by Rakhiuppal1982 21st September 2019 8:31 PM

## Work done against the gravity by taking  a 10kg block to height 1m in 1sec will be?here why we take external force equal to mg

Asked by ashutosharnold1998 28th September 2019 9:58 PM

## Which of the following statement is incorrect about conservative field?i have doubt in option one.work done by conservative field is equal to change in potential energy then how option one is correct where in place of potential energy ,kinetic energy is written

Asked by ashutosharnold1998 30th September 2019 1:47 PM

## Calculate the work done in raising a stone of mass 6 kg of specific gravity to emerge in water from a depth of 4m to 1m below the surface of water

Asked by PalakSrivastava15062003 5th October 2019 1:05 PM

## in displacing a body 5 metre by a force of 50 Newton the work done is 125 joule find out the angle between the direction of force and displacement

Asked by karanbora625 11th November 2019 7:12 PM

## ⭕ Help me in this question...Thanks☺️ ↪️Refer to attachment ↩️

Asked by jhajuhi19 20th November 2019 6:56 AM

## What do you mean by work done give it SI unit and dimension formula.

Asked by shubvrma8081 17th December 2019 10:58 PM

## Machine left side of 200 kg in vertically upward direction if the machine is driven by freely falling mass of 40 kg through a distance of 8 metre in 4 second calculate force exerted by falling mass work done by falling mass power input of machine power output of machine if its efficiency is 75%

Asked by saritamehta3010980 23rd January 2020 1:24 PM

### NEET NEET Physics

Asked by Prashant DIGHE 29th January 2020 10:22 PM

## Write down the expression for workdone in the extension of wire.

### CBSE XI Science Physics

Asked by Prashant DIGHE 4th March 2020 10:03 PM

## Work done when an object goes up on a rough inclined plane with explanation . How Frictional force is added up in this case??

Asked by vijaygireesh 3rd April 2020 9:56 PM

## physics

Asked by pankajkrpal178 25th April 2020 4:34 PM

## Derivation of w=mgh

Asked by sanjeevrao.2704 4th June 2020 8:43 AM

## Work done does not depend on the distance travelled. Give reason.

Asked by Deepak 6th July 2020 6:23 PM

## Why only cos titta is used in work why other trigonometry identities are not used???

Asked by kruthikalakshmim 21st October 2020 6:02 PM

## A man weighing 70 kg carries a 30 kg box to the top of a building 20 m high . Calculate the work done by the man .

Asked by Chaudharidc009 3rd January 2021 8:29 PM

## a coolie with a load of 30kg on his head, walks on the platform. if he walks a distance of 60m what is the work done by the coolie? how much energy is gained by a box of mass 20kg when a man runs carrying the box with a speed of 3m/s to catch the bus? what is the difference in the answers in these two questions? is the meaning the same, please explain.

Asked by saibaba1069 2nd April 2021 8:40 PM

## Workdone

Asked by pottavarthiprashanthkumar 11th May 2021 1:03 PM

## what is potential difference?

Asked by chetnakanojia9311 21st May 2021 10:46 PM

## If 3 men or 4 women can do a piece of work in 43 days how long will 7 men and 5 women take to complete the same work ?

Asked by ekanshbisht107 31st August 2021 10:23 AM

## Why is work a scalar quantity ?

Asked by Deepak 1st October 2021 12:02 PM

## A car of mass 2 kg is moving with speed of 10m/s.  Calculate work done to stop it ?

Asked by atiquzzaman100 21st October 2021 1:35 PM

## when the force is acted normally to the body then the workdone will be __________

Asked by diahant.taunk10 24th November 2021 8:46 AM

## .

Asked by prince11230sharma 13th January 2022 6:37 PM

## an object thrown at a certain angle to the ground moves in a second path and falls back to the ground the initial and the final point of the path of the object lies on the same horizontal line what is the work done by the force of gravity on the object?

Asked by aartilodhi13 2nd February 2022 5:18 PM

## Heat is added to 10^3 cubic cm of water at atmospheric pressure. The water's temperature increases by 50 degrees celsius. Find (a) the work done by the water as it expands (b) the increase in water's internal energy.

Asked by arjunsah797 1st March 2022 3:01 PM

## when we push the car,workdineyis 0,how

Asked by vaniimtiyaz630 12th May 2022 12:19 AM

## the work done is moving charge of 2c across two point having a potential difference of 12volt

Asked by tahseenaamir07 25th June 2022 1:33 AM

## Magnetic force

Asked by swayamagarwal2114 17th July 2022 12:04 PM

## During calculation of acceleration due to gravity above the surface of earth if we assume that there is an external force opposite to that of Earth's gravity then the cos angle will be 180 between the two forces which is negative(-1), if we put the value in the equation of dw = F.dx then the final value of potential energy is positive which is not possible.how and why??

Asked by anushkaverma.25707 24th August 2023 7:35 PM

## Assertion (A): In real and Ideal conditions, work done by a mass tied at the end of a string, rotating uniformly in a circle, is zero. Reason (R): Work done is never zero in vacuum conditions. (a) Both (A) and (R) are true and (R) is the correct explanation of (A). (b) Both (A) and (R) are true but (R) is not the correct explanation of (A). (c) (A) is true but (R) is false. (d) Both (A) and (R) are false.

Asked by navycuber2738 29th February 2024 2:14 PM

## The work done in moving a body of mass m up an inclined plane of inclination θ to the horizontal, height h and length l ( no friction ) are related as

Asked by sarthakbhoskar7630 5th March 2024 7:03 PM

## Help me

Asked by nandichandi33 24th March 2024 9:21 PM

## pls someone solve this

Asked by sahoobanita89 30th April 2024 5:10 AM

## here

Asked by parallelpie595 4th May 2024 6:58 PM