Recent content by srj200

For the second part, I think it would just be, Fs = Fg, where Fs is the force of the spring and Fg is the force due to gravity. So, kx = mg, where k is the spring constant, m is the mass of the brick in kg, g is the acceleration due to gravity, and x is the displacement. Solve for x. The...

Thanks for the help. I got it.

It should be the centripetal force is equal to the force of friction since you want the minimum force to keep him on the merry-go-round. So Fc = Ff, where Fc is the centripetal force and Ff is the force due to friction. Since you already have the mass and the radius you need to convert angular...

You have to use the quadratic forumla. t= [-b +/- (b^2 - 4ac)^(1/2)] / (2a) This corresponds to an equation in the form of 0 = at^2 + bt + (some constant, in your case 45 since you would add it from the left to the right side of the equation.) When you solve for t, you'll get two answers...

mgh=mv^2/r... So PE = Fc? Fc being the centripetal force. I don't think that's right. PE is in joules and Fc is in Newtons. I think it might actually be: PE=KE mgh = [(1/2) mv^2] + Wf, where height (h) is your radius and W is the work done by friction (-.160J). When you use -.160J make...

Homework Statement A body oscillates with simple harmonic motion along the x-axis. Its displacement varies with time according to the equation A=Ai * sin(wt+ (pi/3)) , Where w = pi radians per second, t is in seconds, and Ai = 2.4m. What is the phase of motion at t = 9.4 seconds...