Recent content by kevinr

ah ok ;) makes sense. Thanks!

Homework Statement The potential as a function of position in a region is given by V(x) = 3x - 2x^2 - x^3. (x in meters and V in volts). Find equation for electric potential field. Homework Equations v = integral(E * dr) The Attempt at a Solution I tried taking the derivative of...

Ah ok thank you i got it now!

"There are a few (fun!) ways to solve this problem." :D I can't any find of the fun ways to do this problem. I know f and T but what do i do with that? (im thinking that it since my T = 3.24, it should be less) right?

[SOLVED] Simple Harmonics Homework Statement A 10.0 kg mass is traveling to the right with a speed of 2.40 m/s on a smooth horizontal surface when it collides with and sticks to a second 10.0 kg mass that is initially at rest but is attached to a light spring with force constant 75.0 N/m...

O ok it works in radians. Thanks!

Its an equation given to me. Problem said exactly what i posted. Everything was given to me and everything is correct. When i solve this: i get .073965879 Can anyone confirm this? I tried that and it was wrong. (my calculator is in degrees mode - i think that's right)

[SOLVED] Simple Harmonics - Kind of wierd Homework Statement Question: A 1.30 kg mass on a spring has displacement as a function of time given by the equation: x\left( t \right) = \left( {7.40\;{\rm{ cm}}} \right)\,\cos\:\left[ {\left( {4.16\;{\rm{ s}}^{ - 1} } \right)t - 2.42}...

Thanks! I managed to figure it out after you Hint =D.

removed cause i figured out after the hint!

Ok so that means that the 17 cm i got is compared to the old equilibrium? If so, i have no idea how to get the new equilibrium point. Wouldnt the new equilibrium point be the new altitude you get? (since altitude is measured from equilibrium). Thanks for help!

Amplitude after the small ball has fallen off. (of the big mass only) Oops forgot that

[SOLVED] Simple Harmonics Question Homework Statement A 1.40 kg ball and a 2.20 kg ball are glued together with the lighter one below the heavier one. The upper ball is attached to a vertical ideal spring of force constant 170 N/m, and the system is vibrating vertically with amplitude 19.0...

o ok thx!

[SOLVED] Related Rates - Sort of confused Homework Statement There are two buildings. One 20' high and other 40' high with a 60' distance between them. A person walking between them creates a theta with the buildings (see pic) PICTURE...