A 3.6 kg ball is attached to a 1.47 m long string and swung in a vertical circle at a constant rate of 4.1 revolutions per second.    Calculate the tension in the string when the ball is at the highest point in the path. T =    N

In the game of tetherball, a ball is hung from a vertical pole via a 0.75m rope. The rope is allowed to pivot freely from the top of the pole so the ball can swing around the pole. If the angle of the rope is 30° with respect to the pole, how much time does it take the ball to make one complete revolution around the pole?

A vial containing a blood sample is placed into a centrifuge, which spins the sample quickly to separate the blood into its parts. The centrifuge has a radius of 0.12 m, and spins at a rate of 1750 rpm. If the blood sample and vial have a combined mass of 95 g, what is the centripetal force holding the vial in place?   22.0 N   991 N   4030 N   383 N

Hi, today I had my engineering mechanics 1 test which I completely screwed up. I was quite confident in the uniform circular motion, but I had this problem in my exam which completely confused me. When I read "upward vertical acceleration" my head just start to spin as I couldn't understand what force could cause an upward acceleration. Could you help me with this problem? I bet it is easier than it looks, but still, I am confused about what is asking me and most importantly about the input it is giving me. I don't have my exam paper with me, but on my body diagram, I knew that on the aeroplane were exerted the Force of Contact Fn1 and the Force m1g in the y opposite direction. On the pilot was acting the Force of Contact with the seat of the aeroplane Fn2 and the m2g in the y opposite direction. Here is the problem: During an air show an aircraft comes out of a dive at the bottom of a circular arc at a horizontal speed of 97m/s. In the cockpit the aircraft pilot of mass 58kg…