Recent content by losthelp

thats it? hmmm thank you so much mark! you're a life saver! XOXOXOOXOXOXOXO

THANK YOU! now the period of my function is 3, and i know how a cosine graph looks like. so could u at all tell me what I am suposed to be looking for :S sorry/thanks!

mark can you please answer me because I am really quite desparate now!

why does it matter if i make it 100pi/3 * cos((2pi/3)t) ...isnt it the same thing? well if i solve it like that: 80= 100pi/3 * cos(2pi/3t) 0.7639= cos((2pi/3)t) 2.2918=cos ((2pi)t) t=...

if anyone could take a stab at it hatd be great :)

An object goes through simple harmonic motion with its position described as... Homework Statement An object undergoes simple harmonic motion with its position described by x(t ) = 50sin (2piet/3) C) when is Velocity first equal to 80 D) whe nis the Velocity next equal to 80...

i probalay would if i had any idea what i was doing. :( thanks anyways.

but what would that help me get :S

Homework Statement A 0.5 kg block is sliding across a table top with an inital velocity of 0.2 m/s. It slides to rest in a distance of 0.7m. Find the average friction force that retracted its motion. m=0.5kg vi=0.2m/s vf=0 d=0.7m ff=? Homework Equations vavg= vf-vi, then d/vavg= t...

Work and energy problems :( can anyone help me w. these, I am completely lost! A 0.046-kg ball is dropped froma height of 6m above the ground. When it is 1m above the ground, its velocity will be: An object is dropped from a small height h above the ground. When its height is 0.5h, its...