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5. [2/4 Points] DETAILS PREVIOUS ANSWERS OSCOLPHYS2016 6.3.P.023. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER (a) A 15.0 kg child is riding a playground merry-go-round that is rotating at 30.0 rev/min. What centripetal force (in N) must she exert to stay on if she is 1.00 m from its center? 148.044 (b) What centripetal force (in N) does she need to stay on an amusement park merry-go-round that rotates at 3.00 rev/min if she is 5.00 m from its center? 12:44 XN (c) Compare each force with her weight. force from (a) 1.0071 weight force from (b) weight Additional Materials Reading 6. [1/1 Points] DETAILS 0.005 x PREVIOUS ANSWERS OSCOLPHYS2016 6.3.P.024. MY NOTES just wind bubice bade that is rotation at 9.6.rev/s. Assume the mass is 2kg ASK YOUR TEACHER PRACTICE ANOTHER
2. 10/3 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER The existence of the dwarf planet Pluto was proposed based on irregularities in Neptune's orbit. Pluto was subsequently discovered near its predicted position. But now appears that the discovery was fortuitous, because Pluto is small and the irregularities in Neptune's orbit were not well known. To illustrate that Pute has a minor effect on the orbit of Neptune compared with the closest planet to Neptune, answer the following questions. (a) Calculate the acceleration (in m/s2) due to gravity at Neptune due to Pluto when they are 4.00 102 m apart, as they are at present. The mass of Pluto is 1.4 x 1022 kg. 404-12 x m/s² (b) Calculate the acceleration (in m/s) due to gravity at Neptune due to Uranus, presently about 2.00 x 10¹ m apert. The mass of Uranus is 8.62 x 1025 sp 0.26-10 x m/s² Give the ratio of this acceleration to that due to Pluto acceleration from (b) acceleration due to Pluto OSCOLPHYS2016 6.5.P.040. Additional Material 204 PRACTICE ANOTHER