Question

Re - Part A The mass of a regulation tennis ball is 57 g (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 30 m. (This number can also vary, depending on the racket and swing.) We shall assume a 30.0-ius contact time. The fastest- known served tennis ball was served by "Big Bill' Tilden in 1931, and its speed was measured to be 73 m/s What impulse did Big Bill exert on the tennis ball in his record serve? Assume that the positive direction is along the final direction of motion of the ball Express your answer with the appropriate units. GHA O 2 ? .- Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B What force did Big Bill exert on the tennis ball in his record serve? Express your answer with the appropriate units. HAR O ? . = Value Units

Please answer all four

Answer 1

solution Part A Im þarfse applied by Big Bill 0 0 = 4,161 NS 30X10-3 = Change in the momentum of the ball OR J = o p = m VE = 57x10273 J = 411617 MS part By As J = Fot → = I = 1016) N = 138.7 N Fx = 138. 7 IN part et Impulse applied by opponent = Ja -mut' J = -57x103x55 = – 3:135 NS J = E31/35]ns] Part D > J= Fat ) - 3135 = F x 30x103 F = = 3:135 N 30 X103 -104.5 = N Fx = [-louis M