Recent content by kadavis2010

Well it's an online assignment so it imediantly tells me if i am right or wrong... I did it with a calculator several times... What am I doing wrong?

Homework Statement What is the speed of a 0.145 kg baseball if it's kinetic energy is 105 J? Answer units in of m/s Homework Equations kinetic energy = 1/2mv^2 The Attempt at a Solution 105= 1/2(0.145)v^2 105= .0725v^2 v= 36.06

Yeah i meant what you said second... so would i have 24/9... with the square root of course.. but then would it be square root of 24 over 3?

thanks but it has to be an answer in like the form i stated. Or maybe i am just not understanding you...

Homework Statement √8/3 Homework Equations none but there can't be any radicals in the denominator The Attempt at a Solution =√8/√3=2√2/√3... what do i do now.. I can't have a radical in the denominator

Homework Statement 6x^2-11x+4 Homework Equations none The Attempt at a Solution MP 24 6x-2 6x+12 answer being: 6x+2 and x-2

Well it is a online assignment and we have to submit the answers in the answer blank. Not that i look at it though i have no idea where i got -5285 from but it was right.. I know there is an answer to it because some of my friends worked with the teacher and got the answer but they don't know...

Ahh i figured it out. I was submitting it in the wrong blank.

Ok so now i did .5(1880)(14.7)^2 = 203124.6 It's still wrong...

Homework Statement A (n) 1880 kg car travels at a speed of 14.7 m/s. What is it's kinetic energy? Answer in units of J. Homework Equations Kinetic energy= 1/2mv^2 The Attempt at a Solution 1/2(188)(14.7)^2= 20312.46 My answer is wrong though... What did i do? I keep getting all the...

I just copied and pasted the problem off of online. That is all that is says.. It does say "Find the work done by the force of friction on the flight bag. Answer in units of J." But i found that answer being -5285.02... I don't think that's important though..

So you are saying to do 47/15000? that would equal .0031... then would i do the square root of it or leave it at that? ohhh nvm i did that on one of my attempts but i forgot to put .0 in front of .0557=] Thanks a lot. I apperciate it!

Homework Statement A catcher “gives” with a baseball when catch- ing it. If the baseball exerts a force of 466 N on the glove such that the glove is displaced 11.6 cm, how much work is done by the ball? Answer in units of J. (I got this answer and it is 54.056) Find the coefficient of...

Woaa.. i have this exact problem with slightly different numbers... Are you doing homework for utexas?

Homework Statement A spring has a force constant of 30000 N/m. How far must it be stretched for it's potential energy to be 47 J? Answer in units of m.Homework Equations Us= 1/2k(∆x)^2The Attempt at a Solution 47= 1/2 (30000)(x)^2 47=15000(x)^2 -14953= x^2 √14953= 122.28