<p>Consider a strange planet with a radius of 5 x 10^5 m, a day which is one earth hour long and which has a surface gravitational acceleration of 6.0 m/s^2. I assure you that this planet is rotating such that there is significant centripetal force involved. On earth this amount is quite small, amounting to only a fraction of a percent of the weight. Now we know the circumference of the planet and the period of rotation so it will be an easy task to determine the speed of a point on the surface of the earth.</p>
<p>On the surface of the planet is an elevator that is accelerating upward at 1.0 m^2 with respect to the ground. A 100 gm mass is hanging from the ceiling of the elevator at the end of a string 75 cm long. The mass is pulled away from the vertical and given a push such that it travels through the bottom of its arc with a speed of 0.50 m/s</p>
<p>What is the tension in the string?</p>
<p>Lately, I haven't been getting any of the physics and I really dont know what to do since my physics teacher is only a part-time teacher (2 hrs. a day working, and getting paid over $60/hr). Well, I digress. Can anyone help me with this problem?</p>
<p><em>EDIT</em> I don't wanna get a warning, so I will just settle for a hint to get me started.</p>