Question

Two blocks (with masses 20.5 kg and 68 kg)
are connected by a string as shown. The pulley is frictionless and of negligible mass. The
coefficient of kinetic friction between block
and machine is 0.257.

Find the change in the kinetic energy of the
block on the incline as it moves a distance of
15.4 m up the incline if the system starts from
rest.

Answer 1

first, I have to set up equation for sum of force, find net force, then multiply it by the distance, right?

Answer 2

reported abusive - CHEATING !!!!

Answer 3

How is that cheat? I'm looking for a way to solve this problem.

Answer 4

And my way doesn't work.

Answer 5

So, report that problem as something you didn't solve

Answer 6

everything else is on the side. Understood?

Answer 7

are you learning physics or building problem solving skills?

Answer 8

I just need help, I can't figure out how solve this problem... Thats why I am here... Isn't it what Openstudy is for?

Answer 9

Both...?

Answer 10

you can't cheat, this has to be stopped. Ask this question out of your knowledge of theory.

Answer 11

hey @greeky42 he is just trolling just ignore him

Answer 12

speak to me directly, like this:

Aren't you trolling now?

Answer 13

that's concern #1

Answer 14

do not assume for me. Is that clear?

Answer 15

And my theory is apparently wrong, and I don't know why. And it's isn't cheating. You are obviously trolling, just like Yahoo! said.

Answer 16

\[W = \Delta K.E\]

Answer 17

intial K.E is 0 brcoz the body was at rest..)

Answer 18

It's not *YOUR* theory, it's your knowledge.

Answer 19

so, it's knowledge which is wrong, theory is always there.

Answer 20

@Yahoo! And \[W = x \sum F\] right?

Answer 21

My knowledge*

Better, knowledge nazi?

Answer 22

Sorry to interrupt. I think it's better to stop the discussion on cheating here.

And also, it's okay to seek help for your homework, as long as you're looking for a way to learn how to do it, not just copying others work.

@ndwelsh I think we'd better have a private talk.

Answer 23

what is fun about substituting numbers to formulas? Aren't you striving for better degree? What are you supposed to learn? Physics, elementary principles of expressions and variables?

Answer 24

@Callisto - who am I talking to now?

Answer 25

nw ur job is to Find Work done..By the Body on incline

Answer 26

Whatever you are trying to achieve in the future will unfold improperly. MARK MY WORDS NOW, bunch of puppets

Answer 27

\[W=F.S.\cos \theta \]

Answer 28

@ndwelsh Like, you think I take physics for absolutely no reason?

Sure... And you are here, trolling and claiming everyone is cheating... I think your life has been unfolded improperly.

Answer 29

Or another way to approach this is find accl

Answer 30

Hold on there horse, don't you say "trolling" regarding my name any more? It's your stupid cheating Wikipedia type of philosophy that explains your inadequacy better than my life.

Answer 31

answer now, what's wrong about using reference books better than theory books?

Answer 32

Apparently I'm more knowledgable in this topic than you are

Answer 33

Yet, I don't need you, fortunately. There are knowledgable beings who are wise enough not to troll in this site and are willing to help others. What about you? Answer now. What do you do with your life? Trolling? Well, that's pathetically sad.

Beside you are wasting your time.

Answer 34

@Yahoo! How can I find acceleration? its seems that there is not enough information.

Answer 35

discussing my life at this point seems to be more off the topic. --- THAT'S FOR ADMINS TO TAKE NOTE

don't you SPIT THAT POISON IN MY FACE, fraking DOLL?

Answer 36

JUST GET THAT, CHEATER - BECOME PUNISHED FOR THAT IN FUTURE

Answer 37

@ndwelsh Delight me.