The fastest tennis service by a man is 246.2 km/hr by Andy Roddick of the United States of America during a match in London in 2004. Calculate the ball’s momentum if it has a mass of 58 g.

Given data here are,

velocity , v= 246.2 km/ hr = 246.2 x 1000/ 3600 m/s

v = 2462/36 m/s = 68.388 m/s 

mass, m = 58g = 0.058kg

therefore momentum p is

p = m x v

p = 0.058 x 68.388 

p = 3.966 kgm/s