When served at 200 km/h (124 mph), what is the equivalent weight exerted on the tennis ball?

Answer 1

it is one of:
a box of mineral water (15 kg)
Andy Murray and Novak Djokovic (162 kg)
Four bags of cement (200 kg)
Tiger (320 kg)

Answer 2

f=ma
m = 0.057kg
a = 55.6 ms