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- The paths of two small satellites, X and Y, of equal mass of 4.00 kg each, are shown below. They orbit around a massive star, as illustrated, with M = 6.20x1029 kg The orbits are in the plane of the paper and are drawn to scale. %3D a C In the statements below KE is kinetic energy, PE is potential energy, and L is magnitude of the angular momentum. At a, the PE of X is .... that of Y. v The speed of Y at c is .... that at a The L of X at p is .... that at u. At a, the KE of X is .... that of Y. The PE of Y at c is .... the PE of X at w Submit Answer Tries 0/12 Send FeedbA string is wound around a uniform disk of radius R and mass M. The disk is released from rest with the string vertical and its top end tied to a fixed bar. Using kinematics, calculate: A) the tension in the string as the disk unwinds and falls, B) the acceleration of the center of mass of the disk, C) the speed of the disk after falling a distance H. D) Verify your answer to C) by using the energy method.A solid ball of mass 0.10 kg and radius 2.8 cm is released from rest on a no-slip surface at a height of 0.75 m above the bottom of the track, as shown. After reaching its lowest point, the ball begins to rise again, this time on a frictionless surface. Find: a) the ball's angular speed when it is on the frictionless side of the track and b) the height ball rises on the w = 120 rad/s; h = 0.54 m frictionless side.
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- A particle with mass 0.025kg is attached to massless cord passing through a hole in the surface. The block is originally revolving at a distance of 0.30m from the hole with an angular speed of 1.75 rad/s. The cord is then pulled from below, shortening the radius of the circle to 0.15m What is the new angular speed? How much work was done in pulling the cord?A wheel is rotating at 15 rad/s. a)The angular acceleration of the wheel if it stops after 20 seconds. b)The angle through which the wheel rotates in coming to rest? c)The number of revolutions made by the wheel in coming to rest?