Recent content by discosucks

Homework Statement so my local supermarket is doing a competition were you guess the amount of ducks in this trolley . [/B] Its summer here in Ireland I have no college so I am pretty bored and said i would have a go at solving this with maths , but because its summer time it also means I am...

Just having a think about comets this morning . Im guessing the tails associated with comets are fragments of rock and ice from the surface of the comets but what is causing them to come off the surface if the comet is traveling through no medium to cause a force to move the bits that a make...

Oh perfect i actually over looked that! thaks again for your help!

Ah so the work done is the same as the KE ! I know the work done is 576J so that's the same as the KE! thanks for your help :)

If I am totally honest I am not sure what KEf and KEo stand for .

Yes but I am not sure i totally understand what to do when with the formula we have

ummm well the force by the distance will give me the work done 32 x 18 = 576J Im almost sure there is a relationship between work and KE but i can't work out what ?:)

Great! thanks lads! this site rocks! need to find a similar one for chemistry and biology haha

Homework Statement An object is accelerated from rest by a force of 32 N over a distance of 18 m. Calculate the kinetic energy of the object after 18 m Homework Equations KE = 0.5 • m • v^2[/B] The Attempt at a Solution I can't work out where ill be able to get the mass or the velocity...

Homework Statement An 850 kg car accelerates uniformly from rest to 33 m/s in a distance of 120 m. What is the magnitude of the net force acting on the car? Homework Equations F = ma dynamic equations The Attempt at a Solution So i think i have this one sorted but just posting to see iv...

Sorry i think i get it now the weight is the mass times gravity 1250 x 9.81 =12262.5 12262.5 x 8 = 98100 J .

So its just the weight by the distance seing as the acceleration is zero? 1250 x 8 = 10000 J ?

Im pretty confused now lol but I'm going to say its gravitational force bearing down ?

force? and that would be the mass x the acceleration but what do i say the acceleration is seeing as I am told its constant?

work is when a force moves its point of application through a distance . isnt that the same as W = Fs?