In an 89s interval, 483 hailstones strike a glass window of area 1.245 m² at an angle 27° to the window surface. Each hailstone has a mass of 2 g and speed of 12.6 m/s. If the collisions are elastic, find the average force on the window.
a) 8.95 N
b) 9.42 N
c) 10.17 N
d) 11.28 N