A solid disk of radius R = 22 cm and mass M = 900 g has string wound around its rim. It is hung from a ceiling and released from rest as shown in the diagram with the string taut and vertical. ,What is the acceleration of the disk? 14.72 m/s? 6.54 m/s2 9.81 m/s? 5.89 m/s? 4.9 m/s? Suppose that 70 cm of string unwinds from the disk from the instant it was released from rest (that is, the disk drops 70 cm from its initial position). What is the speed of the center of mass of the disk? 3.03 m/s 2.27 m/s 5.24 m/s 3.21 m/s 2.62 m/s

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?

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…

A ball of mass m = 0.275 kg swings in a vertical circular path on a string of length L = 0.850 m as shown.  At the lowest point in its vertical path the ball is 1.5 m from the ground. If the string is cut when the ball is at the bottom of the string moving with a speed of 7.5 m/s, how far in the x-direction does the ball move before hitting the ground?