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## How to find Work done by drag force in the air?

Asked by 2nd March 2008 7:59 PM

## Equilateral triangle with each corner havung a mass m each, if we double the size of the triangle. Work done by external agent in doubling the size is?

Asked by Amyra B 9th November 2014 8:09 AM

## Two point charges A and B of values 5*10C and 3*10C are kept 6cm apart in air .calculate the work done when charge B is moved by 1cm towards charge A .  [ with simple explanation and diagram ]

Asked by yash.bisht9910 6th June 2015 12:17 PM

## If the angle between F=2N and displacement d=4m,angle is 45 .find the work done by this force.

Asked by thakursonali2000 27th August 2015 7:00 PM

## A coolie X is carrying a load on his head climbs up a slope and another Y carrying the identical load on his head moves the same distance on the frictionless horizontal platform.Who does more work? Explain the reason

Asked by Prameela 16th October 2017 10:10 PM

## Q.

Asked by Arushi Juyal 16th December 2017 7:35 AM

## Calculate the power output of a gun which fires 30 bullets of 100g each with a velocity of 500m/s in 10s.

Asked by aahnik.mohanty 19th December 2017 9:04 PM

## Prove that the increase in kinetic energy of a body=work done by the force on the body.The velocity of the body is increased by applying a constant force for some distance in the direction of motion.

Asked by aahnik.mohanty 19th December 2017 9:13 PM

## two point charges q1 nad q2 are placed at a distance r1 and r2 respectively in an external electric field . obtain an expression for total work done in assembling this configuration?

Asked by vasturushi 25th December 2017 7:05 PM

## It takes 20s for a person A to climb up stairs while the other person B does the same in 15s. compare the (1) work done (2)power developed by person A and B

Asked by Muruga 19th February 2018 8:23 PM

## 8 a part

Asked by lovemaan5500 25th February 2018 6:48 AM

### CBSE XII Science Physics

Asked by Balbir 27th February 2018 9:11 PM

## Plaese answer the following question

Asked by Balbir 27th February 2018 9:20 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

## consider  a  rain  drop  of  rain  water  having  mass 1g  falling  from  a  height  of   1km. it  hits  the  ground  with  a  speed  of  50m/s . take   'g'  constant   with  a  value  10m/sec.square. The  work  done by  the  [a] gravitational  force  and  the  [b]  resistive  force  of  air  is ?

Asked by PARDEEP 31st March 2018 3:43 PM

## Pls solve

Asked by g_archanasharma 28th April 2018 8:59 AM

## 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

## A system absorb 20 kJ heat and also does 10 kJ of work. The net internal energy of the system is :- (1) increases by 10 kJ (2) decreases by 10 kJ (3) increases by 30 kJ (4) decreases by 30 kJ

Asked by Atulcaald 25th May 2018 12:31 AM

## if force is given F=(4x+5) then estimate the gained amount of energy in displacing the system from x=1 to x=3

Asked by puneetgarg2555 18th June 2018 7:19 PM

## A is 3 times faster than B and takes10 days less than bto do a work. Find howmany days are required by each to complete the work separately.

Asked by nathsantanukumar 10th August 2018 7:13 AM

## Suppose there are three people working on a project. A and B can complete it in 12 days, B & C in 15 days and C & A in 20 days . How long will it take to complete the project it a all three work together  and b) each of them work weparately?

Asked by nathsantanukumar 10th August 2018 7:21 AM

## Tell me fast sir.

Asked by jsa788153 19th August 2018 3:49 PM

## A contractor with a work force of 420mens can complete a work of construction of a building in nine months. Due to request by the owners he was asked to complete the job in seven months. How many extra men he must employ to complete the job?

Asked by narenderrohila75 16th September 2018 8:24 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

## A load of mass 30 kg is lifted up by 7.0 m. Calculate the work done. (Take g=9.8 m s-².

Asked by Bhagatsania12 24th September 2018 10:52 PM

## 13 men can weave 117 baskets in a week.How many men will be needed to weave 189 baskests in 3 days

Asked by ankitray26132 1st October 2018 5:40 PM

## A, B and C can separately can do a work in 2,6 and3 days respectively. Working together , how much time would they require to do it? If the work earns them RS 960 how should they divide the money?

Asked by ojhautkarsh12345 9th October 2018 8:45 AM

## Rajan do ajob in 60 days how much of the job will he able to finish in a day

Asked by akhtaransarijsr 21st October 2018 1:20 AM

## Find the work done when a point charge of 2.0 micro coulomb is moved from a point at a potential of -10V to a point at which the potential is zero?

Asked by Anushka 23rd October 2018 12:20 PM

## 30 men complete work in 16 days how many men can complete work in 20 days?

Asked by atul_rclal 25th December 2018 9:59 PM

## Kamala can do a work in 15 days. Bimala is 50% more efficient than Kamala. The number of days, Bimala will take to do the same piece of work, is

Asked by rushabh123 31st January 2019 9:40 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

## A force of 15N is required to pull up a body of mass 2kg through a distance 5 m along an inclined plane making an angle of 30° with the horizontal. Calculate: Work done by the force in pulling the body, Force due to gravity on the body Work done against the force due to gravity  (g=9.8 m/s2) Account for the difference in ans.s of 1. And 3.

Asked by malapandey8278 11th February 2019 7:49 AM

## 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

## 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

## A force 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 pereirajoshua124 20th February 2019 9:20 PM

## a man drags a block through 10m on rough surface (mew=0.5). A force of root3 kN acting at 30 to the horizontal . the work done by applied force is

Asked by Vedantshinde4may 25th February 2019 5:10 PM

## An object 'P' of mass m is lifted from a point A on ground to point B at a height 'h' above the Earth by RinaandMita, but the path taken for doing it is different by both  which force is doing positive work and which one is doing negative work ?

Asked by Farheen1447 3rd March 2019 5:41 PM

## 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