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work
In physics, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement. A force is said to do positive work if (when applied) it has a component in the direction of the displacement of the point of application. A force does negative work if it has a component opposite to the direction of the displacement at the point of application of the force.For example, when a ball is held above the ground and then dropped, the work done by the gravitational force on the ball as it falls is equal to the weight of the ball (a force) multiplied by the distance to the ground (a displacement). When the force F is constant and the angle between the force and the displacement s is θ, then the work done is given by:
W
=
F
s
cos
θ
{\displaystyle W=Fs\cos {\theta }}
Work is a scalar quantity, so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J), the same unit as for energy.
Morning all,
I've recently cleaned my F&E, microbore central heating system using Sentinel X400 and this led to the cold rads heating up again, so a success in that respect*. Now, after a week of the X400 circulating, today I cleaned the F&E tank again (much cleaner water), drained down the...
Any body use a gazebo type thing for external work? More thinking of oil installs.
I want something fairly hard wearing as it's got to with stand cornish wind and ideally have sides to it.
Hi all
Have recently had to service unvented cylinders and came across a few minor problems, like tundish over 600mm away from PRV etc.
How do I categorise these as I don’t think I could ncs them as in gas work.
Plumed them in but first time inspecting.
Thank you
Huw
Is anyone noticing that customers are tightening their belts a bit ? I have recently been beaten on price by other local tradesmen still winning more than I loose but they seem to be very competitive, not to worried for now but I would like you thoughts gentlemen . Cheers kop
Hi all,:)
I was wondering if anyone knew of any plumbing agency work just on a Saturday or if there is anyone in particular to look out for.
The reason I ask is I'm getting married next year and its getting surprisingly more expensive than we first anticipated.:eek:
Whilst installing a new heat only boiler today I thought why don't we have flow gauges, in litres per min, on the flow immediately after the pump and then on the return near the boiler?
This would allow us to see in real time the performance of the pump and the loss of flow around the system...
Hi,
I have recently moved in to a new home and upstairs is a bath with a tap mixer shower. However nobody knows how it works.
There is the tap then a pipe coming from the middle of the tap to a shower head on the wall. There is no button or switch of any kind and pulling it twisting doesn’t...
Hi all. Sorry for another boring topic on going it alone. Have read through previous ones and am a little more worried now lol but have found some useful info. Work for a national company at the moment mainly doing boiler repairs. I've been doing this for 10 years on a variety of boilers and...
Hi folks,
First post on here so please go easy on me if possible !
I’m a mature student in my 40s based in the Wrexham/Chester area looking to gain further knowledge and experience with a professional plumber.
After a career change 12 months ago, I recently completed City & Guilds Level 2...
Morning guys n gals,
I’ve been asked to price a boiler install ( Logic 30) in a restaurant. Take out old combi. The meter is a u16 with 28mm coming off, there’s a commercial cooker on the floor above about 2m away from the meter and the boiler comes off the 28mm and is about 5m run.
I know...
I had been a plumbers for quiet a few years. I then got my gas by doing my nvq level 3. I just wondered how many gas engineers that do landlord service checks etc... Also fit bathrooms and the like. I ask as I am thinking of adding more appliances to my ticket so landlord certificates could be...
Not my job, pics sent by a mate who is just starting out and wanted some advice.
Pics are of the old pan connector on a bog due to be changed shortly. On googling what's written on side it seems it is this.
Osma 4" Soil Waste Pipe | Fittings - OSMASOIL 4S790 WHITE S/S LONG TAIL BEND 87.1/2...
Hi, still very new to this forum - this is my 2nd posting. Please help if you can. I am replacing round head taps with lever taps (am recently retired and have too much time on my hands!) and have fitted a new hot tap no probs. The cold tap has slightly different pipework - a white plastic...
Hi guys, anyone in the greenford area want some work. It's a really nice job of underfloor heating, unvented, boiler and wetroom plumbing.
It is just a bit far for me these days.
Hi I’m looking for evening or weekend work with a plumber that’s doing gas related jobs as I’m nearing the end of my gas course and need evidence for my portfolio.
I work on new builds so I’m struggling to get some of the required jobs in the portfolio as my work is limited on site.
I’m...
Im going to be removing an old sink from one wall and re positioning the new sink on an adjacent wall
At the moment the hot and cold supplies come in through the wall and branch right for the existing sink.
I need to modify these so that they come in and head straight to the direction of...
I'm looking for a new van, it needs to be big enough for fitting all my plumbing gear in, but also a motorbike. I'm interested in transit, transit custom or VW transporter. For my budget they all seem to have big mileage 110k+. What would you guys recommend?
Anybody know how the water pump in disabled shower pan kicks in and drains away as the water is starting to smell in the outlet. We've just moved in so was wondering do you have to run the shower for the pump in the drain to activate
Hi all, I removed a radiator downstairs to wallpaper when I put it back on the he24 will not fire up at all and shows an error code L9.
The pressure had dropped to 0 so I refilled the system. This happened when I removed a radiator before but last time I shut off all the rads except the one I...
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