Recent content by lanzjohn

Ohh I gotcha. I guess I assumed the tension of the rope canceled out the force of gravity... So it just left the acceleration or Force rather due to the motor. We are just starting to learn dynamics so I am a little shaky on some concepts... Got to love summer classes- they move so damn fast.

Well there is the force of gravity. But isn't that already incorporated into the acceleration of the motor? I guess there is the Force of tension as well...

Homework Statement An elevator (mass 1020kg) is to be designed so that the maximum acceleration is 0.062 g. What is the maximum force the motor should exert on the supporting cable? Homework Equations F=MA The Attempt at a Solution (.062)(9.8 m/s^2) = .6076 m/s^2 F =...

Ok bare with me here, So are you saying that my d=t^2/G is wrong? I understand now how the units don't match up. But where did I go wrong?

ohh I just have to change hours to seconds? Well that would make sense then my number won't be as big, which is a good sign. Okay thanks. ill try that orr maybe not.. Why would I have to change the units of G? T I understand.

Homework Statement A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is T = 2.52 hours. What is density (mass/volume) of the planet? Assume that the planet has a uniform density. Hint: "very close to the surface" means that Rorbit =...

And no that is incorrect. So I take it that is not at all what you said. Well how can I find PE if I don't know mass?

So your saying to find the highest point, which is in the circle I should do: (1/2)mv^2 = mg(2r) (1/2)v^2 = g(2r) V = sqrt ((g(2r))/.5)?

How would I write it for initial position? I thought I wrote it for total E? mg(2r)+(1/2)*mv^2

Homework Statement The string in the Figure is L = 102.0 cm long and the distance d to the fixed peg P is 73.4 cm. When the ball is released from rest in the position shown, it will swing along the dashed arc.How fast will it be going when it reaches the highest point in its swing? Homework...

Homework Statement M1 and M2 are two masses connected as shown. The pulley is light and frictionless. Find the mass M1, given that M2 (7.00kg) accelerates downwards at 2.43m/s2, that the angle theta is 15.0o, and that muk is 0.560. Homework Equations (Read below) The Attempt at a Solution...

Hello, I am studying for a test I have on Monday and in my class we briefly went over adding and subtracting vectors in the y, x, and z components or in other words the i, j, and k. The problem is I do not understand how to add and subtract problems like these to find the length: 32j +...

Homework Statement The diagram below shows two vectors, A and B, and their angles relative to the coordinate axes as indicated. DATA: alpha = 42.7 degrees, beta = 60.0 degrees, A = 6.70 cm. The vector A - B is parallel to the -x axis (points due West). Calculate the y component of...

Motion Equation with constant speed (Time sensitive!) Homework Statement A stone thrown horizontally from a height of 6.02m hits the ground at a distance of 12.90m. The initial speed is 11.64 m/s. Calculate the speed of the stone as it hits the ground. Neglect air resistance. Homework...