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DominantVampire
 one year ago
URGENT HELP
DominantVampire
 one year ago
URGENT HELP

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DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2a block of mass 12 kg is released from rest om a frictionless incline of the angle theta=30 below the block is a spring having spring constant 10^4 N/m. the block stops momentarily when it compresses the spring by 4 cm. how far does the block move down the incline from its rest position to this stopping point

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2does anybody know

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2@ganeshie8 @Compassionate @mathmate @mathmath333

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2i asked this sol. many times but each time the FORMULA is different

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2irish boy come to physics department in my Q which you already answered but what youve answered is energy not the distance, please look other solutions too, i am getting diff. ans

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2http://openstudy.com/study#/updates/557d363be4b0e4e582aa702e

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4there does seem to be some confusion about this. the first thing you need to do always is to draw it  and yes i could probably do this in my head but i would still always sketch it in outline just to be sure. that not only aids communications between you and others but will help you get the problem clear in your mind and it will also be a place to define variables such as vertical distance and distance along the slope  which are important here. you should do that first using the "Draw" widget that OS provides after that we can work through it.

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2dw:1434455352074:dw

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4yeah!! dw:1434455454721:dw this is what i mean by adding in other data. make sense?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4so "frictionless" means no energy lost to friction/heat, yes? that means we are looking at loss of grav potential energy of block which converts to potential energy in spring. simplest way to do it. is that what you are after?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2yes that's what it mean and that's what i'm after

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4why not makes it easy for now just by calculating the energy in the spring when it is compressed 4cm. just work that out.

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2oka so this is the first step? 1/2 (10^4)(4)^2

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4mmmm. units? maybe this is where you are going wrong?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2convert 4 cm into mterers so 0.04 m the ans i get K.E= 8J

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4dw:1434456031864:dw

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.48J here too all good so far now that is the grav potential energy the block lost by sliding down the slope. we need now calc h  see the diagram. know how to?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2U= mgh ? perhaps the P.E

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2i dont know, sighs, thats where i get confused perhaps we use energy conservation formula

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4looks good. do the sums and we can compare results. do you use g = 10 or 9.8?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.29.8 to be exact

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2how to find h? where U= mgh U is??

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2we might resolve into its components ?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4look at diagram where i marked "h" in. that is what we want. make sense? mgh = 8J

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2oh so U=K i see (12)(9.8)h= 8 so h is 0.06 m

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4check your calculator: 0.06 m ? i get 0.068 which is closer to 0.07.

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2yes yes it was

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4dw:1434456513348:dw so this is where we are, and another litle sketch to make sure we understand what is happening do you agree with this?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4and question asks: "how far does the block move down the incline from its rest position to this stopping point " do you see it? what is the answer?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2mmm no, i dont. im sorry

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2the answer is h?

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4dw:1434456741787:dw to lose 8J of PE, the block had to fall 0.068m vertically. that involved travelling distance d down the slope. so this now becomes a simple trig problem....

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4do you know trigonometry? sin, cos, tan and the rest?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2oh yes im sorry

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4you have the opposite, you want the hypoteneuse, sohcahtoa....

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4we're close, are you still there or wanna finish later?

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2im sorry there was a power cut

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4well, fire away. use trig and get d from h = 0.068 and angle = 30degrees

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2it would be dsin30=h so 0.07/sin30

IrishBoy123
 one year ago
Best ResponseYou've already chosen the best response.4yes, in cm, d = 13.6cm

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2i saw this ans. somewhere else too, let me show you, please do visit

DominantVampire
 one year ago
Best ResponseYou've already chosen the best response.2@IrishBoy123 thankyou so so much
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