MEDAL AND FAN

A 500-lb. pile driver is raised to a height of 12 feet, then dropped. ________ft-lbs of work is done on the pile driver in raising it.

The increase in the pile driver's potential energy is ________ft-lbs.

What is the maximum kinetic energy the pile driver will have after it is released is _________ ft-lbs.

Question

MEDAL AND FAN

A 500-lb. pile driver is raised to a height of 12 feet, then dropped. ________ft-lbs of work is done on the pile driver in raising it.

The increase in the pile driver's potential energy is ________ft-lbs.

What is the maximum kinetic energy the pile driver will have after it is released is _________ ft-lbs.

anonymous · Answer

@chmvijay @thomaster

chmvijay · Answer

what u think the answer would be:)

chmvijay · Answer

how?

chmvijay · Answer

W = Fd = mgd

anonymous · Answer

srry alll wrong! i don't know how to do it!!

chmvijay · Answer

Potential Energy = Weight x Height.

anonymous · Answer

work done is mgh=stored potential energy,all things have to be taken in fps system

anonymous · Answer

the increased or stored potential energy will be as same as the kinetic energy..

anonymous · Answer

6000 the answer of the 1st

anonymous · Answer

but i don't know how to do the others

chmvijay · Answer

Workdone = F *d
                 = Mass * gravityconstant*d
                 = 500lbs *9.8 *12
this will be same for second :)

anonymous · Answer

hey guys,you are doing all wrong..

anonymous · Answer

who's right??

chmvijay · Answer

the question itself is getting miss dude :) let you tell then

anonymous · Answer

you all have to take the value of g=32.17ft/s^2..the answer will be 193020

chmvijay · Answer

yaaaa that i do agree :) thanks for that

anonymous · Answer

both of you take the mks value of g,while using other thinngs in FPS system.

chmvijay · Answer

LOL ITs better to us SI SYSTEMS

anonymous · Answer

yes,then the mass and height is also be taken in SI system.just dont let others to learn the wrong thing.hey pay respect,no racial comment,you fool.

anonymous · Answer

but the 1st one is correct?

anonymous · Answer

omg confused

anonymous · Answer

the 1st one is 6000 the 2nd is 60?

anonymous · Answer

iribeiro all the answer will be same,the work done is the measurement of stored potential energy and also gaining kinetic energy,because the energy is constant in all that process,we are assuming it as a closed system,where there is no energy lost.ok?

chmvijay · Answer

@thomaster @hba @jhonyy9 @UnkleRhaukus @Luigi0210 @nincompoop @e.cociuba  @Nurali @robtobey

aaronq · Answer

who measures anything is lbs, you murikan or something

aaronq · Answer

attachment

anonymous · Answer

I guess the question is not correct.