Question

The photograph below shows a girl pushing on a large stone sphere. The sphere has a mass of 8200 kg and a radius of 90 cm and floats with nearly zero friction on a thin layer of pressurized water.

Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 75 N and that the pressured water provides a frictionless support. How long will it take her to rotate the sphere one time, starting from rest?

Problem 7.54 - Enhanced - with Feedback © Item 2 Item 2 > Review | Constants 1 Periodic Table The photograph below shows a girl pushing on a large stone sphere. The sphere has a mass of 8200 kg and a radius of 90 cm and floats with nearly zero friction on a thin layer of pressurized water. Part A Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 75 N and that the pressured water provides a frictionless support. How long will it take her to rotate the sphere one time, starting from rest? Express your answer with the appropriate units. ': MÅ o 2 ? t= Value Units Submit Previous Answers Request Answer

Answer 1

→ Moment q mestial q Sphere, Is i MR? Torque on Sphere, I = RF si Angular acceleration, da I RR2 = { MR 2- £x o xorn rude? d= 0.025 u radest > Angle ro tated on completing one revolution is 0=217 Now, 0= 4X4 ) t = 120 SA i to v0.0254 2X211 It=22.24 seconds.