PHYS 204A Midterm: PHYS 204A Chico State Exam2 Fall 03s
Document Summary
Solve the following problems in the space provided. Use the back of the page if needed. You must show your work in a logical fashion starting with the correctly applied physical principles, which are on the last page. Fx = max f p cos50 fn = 0 fn = fp cos50 . Fy = may f p sin50 fg = 0 fg = fp sin50 . Fn = f p cos50 = (64. 0)cos50 fn = 41. 4n . Fg = f p sin50 = (64. 0)sin50 fg = 49. 0n . (c)using the mass/weight rule, fg = mg m = M = 5. 00kg : a 50. 0g ball is twirled overhead at the end of a 35. 0cm string. The string will break when the tension exceeds 15. 0n. Neglecting vertical forces such as gravity, find (a)the maximum speed that the ball may have without the string breaking and (b)the maximum number of revolutions per minute that the string can withstand. y.
